Quantcast
Channel: Learn CBSE
Viewing all 10026 articles
Browse latest View live

Heron’s Formula Class 9 Notes Maths Chapter 7

$
0
0

CBSE Class 9 Maths Notes Chapter 7 Heron’s Formula Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 7 Heron’s Formula.

CBSE Class 9 Maths Notes Chapter 7 Heron’s Formula

1. Triangle: A plane figure bounded by three line segments is called a triangle.
In ΔABC has
(i) three vertices, namely A, B and C.
(ii) three sides, namely AB, BC and CA.
(iii) three angles, namely ∠A, ∠B and ∠C.
Heron's Formula Class 9 Notes Maths Chapter 7 1

2. Types of Triangle on the Basis of Sides
(i) Equilateral triangle: A triangle having all sides equal is called an equilateral triangle.
In equilateral ΔABC,
i.e., AB = BC = CA
(ii) Isosceles triangle: A triangle having two sides equal is called an isosceles triangle.
In isosceles ΔABC,
i.e., AB = AC
(iii) Scalene triangle: A triangle in which all the sides are of different lengths is called a scalene triangle.
In scalene ΔABC,
i.e., AB ≠ BC ≠ CA

3. The perimeter of a Triangle: The sum of the lengths of three sides of a triangle is called its perimeter.
Let, AB = c, BC = a, CA = b
i.e., Perimeter of ΔABC, 2s = a + b + c

4. Area of a Triangle: The measure of the surface enclosed by the boundary of the triangle is called its area.
Heron's Formula Class 9 Notes Maths Chapter 7 2
Area of triangle = \frac { 1 }{ 2 } × Base × Height
Area of right angled triangle = \frac { 1 }{ 2 } × Base × Perpendicular

5. Area of a Triangle (Heron’s Formula): If a triangle has a, b and c as sides, then the area of a triangle by Heron’s formula = \sqrt { s\left( s-a \right) \left( s-b \right) \left( s-c \right) }
where, s (semi-perimeter) = \frac { a+b+c }{ 2 }
Note: This formula is highly applicable in the case when we don’t have the exact idea about height.

6. Application of Heron’s Formula in Finding Areas of Quadrilaterals: Let ABCD he a quadrilateral to find the area of a quadrilateral we need to divide the quadrilateral in triangular parts.
Heron's Formula Class 9 Notes Maths Chapter 7 3
Area of quadrilateral ABCD = Area of ΔABC + Area of ΔADC

We hope the given CBSE Class 9 Maths Notes Chapter 7 Heron’s Formula Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 7 Heron’s Formula, drop a comment below and we will get back to you at the earliest.

The post Heron’s Formula Class 9 Notes Maths Chapter 7 appeared first on Learn CBSE.


NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Introduction

$
0
0

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Introduction are part of NCERT Solutions for Class 10 English Main Course Book. Here we have given CBSE Class 10 English Main Course Book Unit 6 National Integration Introduction.

CBSE Class 10 English Main Course Book Unit 6 National Integration Introduction

INTRODUCTION

SUMMARY

It was 1984, Wing Commander Rakesh Sharma went into the space. Indian Tricolour was attached on his space suit. Mrs. Gandhi asked him how India looked from space. He replied ‘best of the world’.

Rakesh Sharma had only one worry. When man reaches the other planets, he should not take the conflicts on the earth with him over there.

Question 1.
Do you think moments of glory make people more patriotic ?

Recall more such moments.

  • The Indian flag was hoisted on the highest mountain peak of the world, Mount Everest on 29th May 1953.
  • When the National Anthem plays during Olympics.

Answer:

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Introduction 1

We hope the NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Introduction help you. If you have any query regarding CBSE Class 10 English Main Course Book Unit 6 National Integration Introduction, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Introduction appeared first on Learn CBSE.

Linear Equations in Two Variables Class 9 Notes Maths Chapter 8

$
0
0

CBSE Class 9 Maths Notes Chapter 8 Linear Equations in Two Variables Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 8 Linear Equations in Two Variables.

CBSE Class 9 Maths Notes Chapter 8 Linear Equations in Two Variables

  1. Linear Equations: Any equation which can be put in the form ax + by + c = 0, where a, b and c are real numbers and a and b are not both zero is called a linear equation in two variables.
    The solution of a linear equation is not affected when
    • the same number is added to (or subtracted from) both the sides of the equation.
    • you multiply or divide both the sides of the equation by the same non-zero number.
  2. A linear equation in two variables has infinitely many solutions.
  3. The graph of every linear equation in two variables is a straight line.
  4. x = 0 is the equation of the y-axis and y = 0 is the equation of the x-axis.
  5. The graph of x = a is a straight line parallel to the y-axis.
  6. The graph of y = a is a straight line parallel to the x-axis.
  7. An equation of the type y = mx represents a line passing through the origin.
  8. Every point on the graph of a linear equation in two variables is a solution of the linear equation. Moreover, every solution of the linear equation is a point on the graph of the linear equation.
  9. Graph of a Linear Equation in Two Variables: We know that a linear equation in two variables has infinitely many solutions. We write the solutions as a pair of values and plot, these points on a graph paper and join them to get a line.

We hope the given CBSE Class 9 Maths Notes Chapter 8 Linear Equations in Two Variables Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 8 Linear Equations in Two Variables, drop a comment below and we will get back to you at the earliest.

The post Linear Equations in Two Variables Class 9 Notes Maths Chapter 8 appeared first on Learn CBSE.

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity

$
0
0

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity are part of NCERT Solutions for Class 10 English Main Course Book. Here we have given CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity.

CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity

TEXTUAL EXERCISES

Question 1.
During the journey, Rohan and Rajini both note down the information they gather about the states they travel through. When they return they jot down this information.

Working with your partner, choose any one journey and complete the grid for them. You may access the internet or refer to hooks in the library to complete your grid.

  • The states that they pass through.
  • The variety of languages they hear.
  • The local cuisines they enjoy.
  • The local handicrafts they buy for their family from each of the states they pass through.
  • The weather they experience.
STATELANGUAGECUISINEHANDICRAFTSWEATHER

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 1
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 1.1

Question 2.
What conclusions do you draw from Rohan and Rajini’s experience ?
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 2

Question 3.
Present your conclusions to the class.
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 3

Question 4.
Where are they from ?
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 4

Question 5.
Look at the pictures given below. Decide in your group which regions the six photos probably come from. Explain why you think so and find out from your teacher if you were correct. Then write a short caption for each photograph. It can be serious or funny.
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 1
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 2

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity 5

We hope the NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity help you. If you have any query regarding CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 1 Unity in Diversity appeared first on Learn CBSE.

Quadrilaterals Class 9 Notes Maths Chapter 9

$
0
0

CBSE Class 9 Maths Notes Chapter 9 Quadrilaterals Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 9 Quadrilaterals.

CBSE Class 9 Maths Notes Chapter 9 Quadrilaterals

1. Quadrilateral: A plane figure bounded by four lines segment AB, BC, CD and DA is called a quadrilateral.
Quadrilaterals Class 9 Notes Maths Chapter 9 1
The sum of the angles of a quadrilateral is 360°.

2. Various Types of Quadrilaterals
(i) Parallelogram: A quadrilateral in which opposite sides are parallel is called parallelogram and it is written as Parallelogram.
Quadrilaterals Class 9 Notes Maths Chapter 9 2
(ii) Rectangle: A parallelogram each of whose angle is 90°, is called a rectangle.
Quadrilaterals Class 9 Notes Maths Chapter 9 3
(iii) Square: A rectangle having all sides equal, is called a square.
Quadrilaterals Class 9 Notes Maths Chapter 9 4
(iv) Rhombus: A parallelogram having all sides equal is called a rhombus.
Quadrilaterals Class 9 Notes Maths Chapter 9 5
(v) Trapezium: A quadrilateral in which two opposite sides are parallel and two opposite sides are non-parallel is called a trapezium.
If two non-parallel sides of a trapezium are equal, then it is called an isosceles trapezium.
Quadrilaterals Class 9 Notes Maths Chapter 9 6
(vi) Kite: A quadrilateral in which two pairs of adjacent are equal is known as the kite.
Quadrilaterals Class 9 Notes Maths Chapter 9 7

3. Important Theorems

  • The sum of all the four angles of a quadrilateral is 360°.
  • A diagonal of a parallelogram divides it into two congruent triangles.
  • A quadrilateral is a parallelogram if
    • opposite sides are equal.
    • opposite angles are equal,
    • diagonals bisect each other.
  • A quadrilateral is a parallelogram if
    • its opposite angles are equal.
    • its opposite sides are equal.
    • its diagonals bisect each other.
    • a pair of opposite sides is equal and parallel.
  • Diagonals of a rectangle bisect each other and they are equal and vice-versa.
  • Diagonals of a rhombus bisect each other at right angles and they are not equal and vice-versa.
  • Diagonals of a square bisect each other at right angles and they are equal and vice-versa.
  • The line segment joining the mid-points of any two sides of a triangle is parallel to the third side and equal to half of it. (Mid-point theorem)
  • The line drawn through the mid-point of one side of a triangle, parallel to another side, intersects the third side at its mid-point. (By converse of mid-point theorem)
  • The quadrilateral formed by joining the mid-points of the sides of a quadrilateral, taken in order, is a parallelogram.
  • In a quadrilateral, if diagonals bisect each other, then it forms a parallelogram.

We hope the given CBSE Class 9 Maths Notes Chapter 9 Quadrilaterals Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 9 Quadrilaterals, drop a comment below and we will get back to you at the earliest.

The post Quadrilaterals Class 9 Notes Maths Chapter 9 appeared first on Learn CBSE.

Areas of Parallelograms and Triangles Class 9 Notes Maths Chapter 10

$
0
0

CBSE Class 9 Maths Notes Chapter 10 Areas of Parallelograms and Triangles Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 10 Areas of Parallelograms and Triangles.

CBSE Class 9 Maths Notes Chapter 10 Areas of Parallelograms and Triangles

1. Congruent Figures: Two figures are called congruent if they have the same shape and same size. If two figures X and Y are congruent (see adjoining figure), then using a tracing paper we can superpose one figure over the other such that it will cover the other completely.
Areas of Parallelograms and Triangles Class 9 Notes Maths Chapter 10 1
So, if two figures X and Y are congruent, they must have equal areas.
However the converse of this is not true i.e., two figures having equal areas need not be congruent. In adjoining figure, the rectangles ABCD and MNPQ have equal areas (8 × 2 cm2 and 4 × 4 cm2) but clearly, they are not congruent.
Areas of Parallelograms and Triangles Class 9 Notes Maths Chapter 10 2

2. Area of a figure is a number (in some unit) associated with the part of the plane enclosed by the figure with the following two properties

  • If A and B are two congruent figures, then ar (A) = ar(B).
  • If a planar region formed by a figure T is made up of two non-overlapping planar regions formed by figures P and Q, then ar(T) = ar(P) + ar(Q)

3. Parallelograms on the same base and between the same parallels are equal in area.

4. A diagonal of a parallelogram divides it into two triangles of equal area.

5. The area of a parallelogram is the product of any of its sides and the corresponding altitude.

6. Triangles on the same base and between the same parallels are equal in area.

7. Area of a triangle = \frac { 1 }{ 2 } × Base × Height

8. If a triangle and a parallelogram are on the same base and between the same parallels, then the area of the triangle is equal to half the area of the parallelogram.

9. Area of a trapezium = \frac { 1 }{ 2 } × (Sum of the parallel sides) × (Distance between them)

10. Area of a rhombus = \frac { 1 }{ 2 } × Product of the diagonals

11. If two triangles have equal areas and one side of the one triangle is equal to one side of the other, then their corresponding altitudes are equal.

12. A median of a triangle divides it into two triangles of equal areas.

13. The line segment joining the mid-points of two sides of a triangle is parallel to the third side. [Mid-point theorem]

We hope the given CBSE Class 9 Maths Notes Chapter 10 Areas of Parallelograms and Triangles Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 10 Areas of Parallelograms and Triangles, drop a comment below and we will get back to you at the earliest.

The post Areas of Parallelograms and Triangles Class 9 Notes Maths Chapter 10 appeared first on Learn CBSE.

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration

$
0
0

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration are part of NCERT Solutions for Class 10 English Main Course Book. Here we have given CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration.

CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration

TEXTUAL EXERCISES

Question 1.
Read the poem given below and answer the questions that follow.

Where the Mind is Without Fear
WHERE the mind is without fear and the head is held high Where knowledge is free
Where the world has not been broken up into fragments By narrow domestic walls
Where words come out from the depth of truth Where tireless striving stretches its arms towards perfection Where the clear stream of reason has not lost its way Into the dreary desert sand of dead habit –
Where the mind is led forward by thee
Into ever-widening thought and action
Into that heaven of freedom, my Father, let my country awake.
— Rabindranath Tagore

  • Why does the poet say, ‘Where the mind is without fear’ ?
  • What are the narrow domestic walls being referred to ?
  • Why are they ‘narrow ’ ?
  • How /when does the ‘clear stream of reason’ lose its way ?
  • What is the poet’s appeal ?

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 1

Question 2.

SWOT ANALYSIS OF INDIA

S : Strengths
W : Weaknesses
O : Opportunities
T : Threats

SWOT analysis is a tool used to develop effective strategies and plans for the progress and development of organizations, companies, institutions and even individuals. Working in groups, identify the strengths, weaknesses, opportunities and threats for our country. Present your group’s views to the class. Your brief presentation should conclue with a ‘vision statement’ for India-where you want our country to be, say ten years from now and what we should do to achieve it.

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 2
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 2.1
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 2.2
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 2.3

Question 3.
On the basis of your reading of the passage answer the following questions by ticking the most appropriate options. Give reasons for your choices.

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 3

Question 4.
Complete the following sentences.

(a) An example of the generosity and kindness of Kalam’s parents is …………….

(b) Kalam feels he had a very secure childhood because …………….

(c) The suspension of train halt at Rameswaram station proved to be a blessing in disguise for Kalam because …………….

(d) Kalam continues to feel proud about the money he had earned in childhood by picking up bundles of newspaper because …………….

(e) Some traits and values Kalam and his siblings inherited from their parents were …………….

(f) The salient feature of Kalam’s relationship with his three childhood friends was that …………….

(g) Two unique examples of communal harmony and brotherhood of mankind are …………….

(h) The nation should be wary of people like the grade V teacher of the narrator because…………….

(i) However, the country needs more and more people like Kalam’s Science teacher Sivasubramania and Kalam’s mother and grandmother because …………….

(j) Kalam’s second visit to his science teacher’s house surprised him because …………….

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 4
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 4.1

Question 5.
Role Play :

Your teacher will divide the class into groups of four and ask them to act out the following roles :

Kalam
Ramanadha Sastry
Aravindan
Sivaprakasan

In your group you should play the role allocated to you by engaging in a conversation in which the friends

(a) Express surprise and joy at meeting each other after nearly fifty years
(b) Fondly recall their childhood times
(c) Compare the problems facing the country then with the problems she is facing now.
(d) Discuss what can be done to rid her of these problems (Refer to the SWOT analysis of India)

After the role play, your teacher will invite some of the groups to share with others what problems they discussed and the solutions they proposed.

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 5
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 5.1
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 5.2

Question 6.

Diary Entry :

Suppose you are Kalam/Ramanadha Sastry. You are upset about being made to sit away from your best friend in the class. Write a diary entry expressing your feelings and reactions. In your diary entry you should

(a) Describe the incident briefly
(b) Say how you and your friend felt about it
(c) Decide what you are going to do about it

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 6
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 6.1

Question 7.
Vocabulary

Read each of the following sentences from the story and tick the word/phrase that gives the correct meaning for the italicized words/phrases in the context in which they are used here.

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 7

Question 8.
Phrases

Match the phrases in Column A with their meanings in Column B

Column AColumn B
(a) break out(i) to try to find somebody or something
(b) to look for(ii) as a rule or in general taking all relevant factors into account
(c) to take over(iii) start suddenly and strongly
(d) to go into(iv) to obtain or assume control of something, or gain control of something from somebody else
(e) on the whole(v) to begin a job or career in a particular area of activity

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 8

Question 9.
Write a letter to the editor of a leading newspaper/an article for your school magazine on ‘Celebrating Diversity, but Working for Unity”

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 9
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 9.1

Question 10.
Assignments

  1. If you were in the selection committee for the National Integration Award who would you choose and why ?
  2. Design a stamp in honour of your hero that captures the important moment of his contribution. You could create a fictional hero also.

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 10

Question 11.
The following passage is an excerpt from an article presented by the author at a meeting organized to observe the national integration week (19-25 November) by the India— Canada Association and the High Commission of India on 25th Nov. 2009.

Read it carefully and answer the questions that follow :

CHALLENGES TO NATIONAL INTEGRATION

SUMMARY
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 11

Question 12.
Based on your reading of the passage answer the following questions :

(a) Why is national integration important for a country like India ?
(b) What are the aims of national integration ?
(c) What are the forces that challenge national integration ?
(d) What are the steps that we should take to strengthen the nation and its unity ?
(e) How can we bind the people of the country and ci^am an emotional bond ?
(f) How can we attain internal freedom for the people of the country ?

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 12

Question 13.
Read the passage carefully and familiarize yourself with the new words used in the passage by working out their meanings. Match the words in column A with their meanings in column B.

Column AColumn B
(a) foster(i) the act of accepting someone as a part of a group
(b) pernicious(ii) excessive enthusiasm for an extreme political or religious cause
(c) integration(iii) encourage the development of
{d) fanaticism(iv) agreement and support resulting from shared interests, feelings or opinions
(e) solidarity(v) having a harmful effect.

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 13

Question 14.
Organize a group discussion on the topic : “Destabilizing Forces Within a Country : Challenges to a Nation”.
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 14
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration 15

We hope the NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration help you. If you have any query regarding CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 2 Challenges to National Integration appeared first on Learn CBSE.

Circles Class 9 Notes Maths Chapter 11

$
0
0

CBSE Class 9 Maths Notes Chapter 11 Circles Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 11 Circles.

CBSE Class 9 Maths Notes Chapter 11 Circles

1. Circle: The collection of all points in a plane which are at a fixed distance from a fixed point in the plane is called a circle. The following examples of the circle are
Circles Class 9 Notes Maths Chapter 11 1

2. Basic Definition

  • Chord: Suppose, we take any two points on a circle, then the line segment PQ is called the chord of the circle.
    Circles Class 9 Notes Maths Chapter 11 2
  • Diameter: The chord which passes through the centre of the circle is called a diameter AB of the circle.
  • Arc: A piece of a circle between two points is called an arc. If P and Q are any two points on them, the PQ is an arc of the circle and it is denoted by AB.
  • Circumference: The length of the complete circle is called its circumference.
  • Semi-circle: A diameter of a circle divides it into two equal parts which an arc. Each of these two arcs is called a semi-circle.
  • Congruent Circles (Arc): Two circles are said to be congruent if and only if either of them can be superposed on the other so as to cover exactly.
  • Cyclic Quadrilateral: A quadrilateral ABCD is called cyclic if all the four vertices of it lie on a circle.
    Circles Class 9 Notes Maths Chapter 11 3
  • Common Chord: The intersection point of two circles is the common chord of the circle.

3. Important Theorems

  • The perpendicular from the centre of a circle to a chord bisects the chord and it is vice-versa.
  • Equal chords of a circle (or of congruent circles) are equidistant from the centre.
  • It two chords of a circle are equal, then their corresponding, arcs are congruent and conversely, if two arcs are congruent, then their corresponding chords are equal.
  • Congruent arcs of a circle subtend equal angles at the centre.
  • The angle subtended by an arc at the centre is double the angle subtended by it any point on the remaining part of the circle.
  • Angle in the same segment of a circle is equal.
  • The sum of either pair of opposite angles of a cyclic quadrilateral is 180° and vice-versa.
  • The angle in a semi-circle is a right angle.
  • If two chords of a circle are equal, then their corresponding arcs (minor, major or semi-circle) are congruent and vice-versa.

We hope the given CBSE Class 9 Maths Notes Chapter 11 Circles Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 11 Circles, drop a comment below and we will get back to you at the earliest.

The post Circles Class 9 Notes Maths Chapter 11 appeared first on Learn CBSE.


NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement

$
0
0

NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement of Distances are part of NCERT Exemplar Class 6 Science. Here we have given NCERT Exemplar Class 6 Science Solutions Chapter 10 Motion and Measurement of Distances.

NCERT Exemplar Class 6 Science Solutions Chapter 10 Motion and Measurement of Distances

Multiple Choice Questions

Question 1.
The distance between Delhi and Mumbai is usually expressed in units of
(a) decametre
(b) metre
(c) centimetre
(d) kilometre
Solution:
(d) : The distance between Delhi and Mumbai is very large so it is usually expressed in units of kilometre.

Question 2.
Which of the following does not express a time interval?
(a) A day
(b) A second
(c) A school period
(d) Time of the first bell in the school
Solution:
(d): Time of the first bell in the school represents a point of time, not a time interval.

Question 3.
Figure shows a measuring scale which is usually supplied with a geometry box. Which of the following distance cannot be measured with this scale by using it only once?
2019-04-13 15_19_25-ch-10.pdf - Foxit PhantomPDF
(a) 0.1m
(b) 0.15 m
(c) 0.2 m
(d) 0.05 m
Solution:
(c): This scale is 0.15 m long so by using it only once, 0.2 m cannot be measured.

Question 4.
A piece of ribbon folded five times is placed along a 30 cm long measuring scale as shown in figure.
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q4
The length of the ribbon is between
(a) 1.15 m – 1.25 m
(b) 1.25 m – 1.35 m
(c) 1.50 m – 1.60 m
(d) 1.60 m – 1.70 m.
Solution:
(b): According to the given figure, the five times folded ribbon piece is (27.5 – 2) cm x 5 (= 1.275 m) long approximately.

Question 5.
Paheli moves on a straight road from point A to point C. She takes 20 minutes to cover a certain distance AB and 30 minutes to cover the rest of distance BC. She then turns back and takes 30 minutes to cover the distance CB and 20 minutes to cover the rest of the distance to her starting point. She makes 5 rounds on the road the same way. Paheli concludes that her motion is
(a) only rectilinear motion
(b) only periodic motion
(c) rectilinear and periodic both.
(d) neither rectilinear nor periodic
Solution:
2019-04-13 15_21_41-ch-10.pdf - Foxit PhantomPDF
Paheli is moving along a straight line with a fixed time period. So, her motion is rectilinear and periodic both.

Question 6.
Bholu and Golu are playing in a ground. They start running from the same point A in the ground and reach point B at the same time by following the paths marked 1 and 2 respectively as shown in figure. Which of the following is/are true for the given situation ?
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q6
As compared to Golu, Bholu covers a
(a) longer distance but with a lower speed
(b) longer distance with a higher speed
(c) shorter distance with a lower speed
(d) shorter distance with a higher speed.
Solution:
(b) : Path 1 is longer than path 2 but Golu and Bholu both have reached point B at the same time, so Bholu’s speed is more than Golu’s speed.

Question 7.
Four pieces of wooden sticks A, B, C and D are placed along the length of 30 cm long scale as shown in figure. Which one of them is 3.4 cm in length?
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q7
(a) A
(b) B
(c) C
(d) D
Solution:
From the given figure, we can observe that stick C lies between 10.4 cm and 7 cm. So, its length is (10.4 – 7) cm = 3.4 cm.

Question 8.
Which of the following figure shows the correct placement of a block along a scale for measuring its length?
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q8.1

NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q8.2
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q8.3
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement 8.4

Solution:
(c): Object should be placed on a scale such that its ends should come in between the readings marked on the scale.

Question 9.
You are provided three scales A, B and C as shown in figure to measure a length of 10 cm.
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q9
For the correct measurement of the length you will use the scale
(a) A only
(b) B only
(c) C only
(d) Any of the three Scales.
Solution:
(d): Length of 10 cm is available in all the three scales A, B and C. So, any of the three scales’ can be used.
Correct the following.

Question 10.
(i) The motion of a swing is an example of rectilinear motion.
(ii) 1m = 1000cm
Solution:
(i) The motion of a swing is an example of periodic motion as it repeats its motion after a fixed interval of time.
(ii) 1 m = 100 cm. Each metre (m) is divided into 100 equal divisions, called centimetre (cm).

Question 11.
Fill in the blanks.
(i) Motion of an object or a part of it around a fixed point is known as_______ motion.
(ii) A body repeating its motion after certain interval of time is in_______ motion.
(iii) In rectilinear motion, object moves a______ line______.
(iv) SI unit of length is_______.
Solution:
(i) Circular
(ii) periodic
(iii) along; straight
(iv) metre

Question 12.
Write one example for each of the following type of motion.
(i) Rectilinear
(ii) Circular
(iii) Periodic
(iv) Circular and periodic
Solution:
(i) An apple falling vertically downwards.
(ii) The motion of a point marked on the hands of a clock.
(iii) Motion of a child on a swing.
(iv) Blades of a rotating fan.

Short Answer Type Questions

Question 13.
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q13
The photograph given in figure shows a section of a grille made up of straight and curved iron bars. How would you measure the length of the bars of this section, so that the payment could be made to the contractor?
Solution:
As the grille is made up of straight and curved iron bars, so the length of the bars can be measured with the help of thread which can be further measured using a scale.

Question 14.
Identify the different types of motion in the following word diagram given.

YOUNGCCNTER
LEVELpIEEAR
ALLOToPPEAI
NOTEPADNECK
OWONEwIYZsE
IEVORLOADwP
TRGNICEDRIL
AZHTONGUENA
TXCRDEPTHGR
OEYCIRCULAR
RTLCCOPPERT

Solution:
NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement q14.1

Question 15.
Four children measure the length of a table which was about 2 m. Each of them used different ways to measure it.
(i) Sam measured it with a half metre long thread.
(ii)with a 15 cm scale from her geometry box.
(iii) Reena measured it using her hand span.
(iv) Salim measured it using a 5 m long measuring tape.
Which one of them would get the most accurate length? Give reason for your answer.
Solution:
Salim would get the most accurate length because’ he is using a 5 m long measuring tape which is longer than the table. So, he can measure the length of the table in one go accurately. While in the other cases the chance of making an error is higher due to multiple measurements. In case of Sam, only that lengths can be measured which are exact multiples of half a metre.

Question 16.
Match the events related to motion in column I with the types of motions given in column II.

Column 1Column 11
(a)A moving wheel of a sewing machine(i)Circular motion
(b)Movement of tip of the minute hand of a clock in one hour(ii)Rotational motion
(0A moving swing(iii)Periodic motion

(a) – (ii)
(b) – (i)
(c) – (iii)

Long Answer Type Questions

Question 17.
While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.
Solution:
While sitting in a moving train, when we look outside the window, the trees appear to be moving in opposite direction because their position is changing with respect to us. On the other hand the position of co-passengers is not changing with respect to us, hence they appear to be stationary.

Question 18.
How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.
Solution:
The wheel of a moving bicycle depicts circular as well as rectilinear motion. Wheels of bicycle rotate on the ground which in turn moves the bicycle forward. A blade of a moving electric fan shows only circular motion as it is not moving from one place to another.

Question 19.
Three students measured the length of a corridor and reported their measurements. The values of their measurements were different.
What could be the reason for difference in their measurements? (Mention any three)
Solution:
Some of the reasons for difference in their measurement could be
(i) Different measuring devices were used.
(ii) The smallest length that could be _ measured by different devices may be different.
(iii) Measurement may not be along the shortest length in all three cases.
(iv) The end of the corridor may not be easily accessible.
(v) The measuring devices may be faulty (not standardised).

Question 20.
Boojho was riding in his bicycle along a straight road. He classified the motion of various parts of the bicycle as
(i) rectilinear motion,
(ii) circular motion and
(iii) both rectilinear as well as circular motion. Can you list one part of the bicycle for each type of motion? Support your answer with reason.
Solution:
(i) Rectilinear motion: Handle bar or seat of the bicycle has rectilinear motion only. It moves in a straight line as the wheels of bicycle move forward.
(ii) Circular motion: Pedal of the bicycle is having circular motion only as it rotates with its shaft but does not move from its place.
(iii) Rectilinear and circular motion: Wheel of the bicycle is having both circular and rectilinear motion. Wheels rotate on their ‘ shafts as well as move forward on the ground.

We hope the NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement of Distances will help you. If you have any query regarding NCERT Exemplar Class 6 Science Solutions Chapter 10 Motion and Measurement of Distances, drop a comment below and we will get back to you at the earliest.

The post NCERT Exemplar Class 6 Science Chapter 10 Motion and Measurement appeared first on Learn CBSE.

Constructions Class 9 Notes Maths Chapter 12

$
0
0

CBSE Class 9 Maths Notes Chapter 12 Constructions Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 12 Constructions.

CBSE Class 9 Maths Notes Chapter 12 Constructions

1. Need of Accurate Figures: Sometimes one needs an accurate figure, for example, to draw a map of a building to be constructed, to design tools and various parts of a machine, to draw road maps, etc. To draw such figures some basic geometrical instruments are needed.

2. Geometry Box: A geometry box contains the following basic geometrical instruments

  • A graduated scale, on one side of which centimetres and Millimetres are marked off and on the other side inches and their parts is marked off.
  • A pair of set squares, one with angles 90°, 60° and 30° and other with angles 90°, 45° and 45°.
  • A pair of dividers (or a divider) with adjustments.
  • A pair of compasses (or a compass) with the provision of fitting a pencil at one end.
  • A protractor.

Normally, all these instruments are needed in drawing a geometrical figure such as a triangle, a circle, a quadrilateral a polygon etc. with given measurements but a geometrical construction is the process of drawing a geometrical figure using only two instruments—an ungraduated ruler, also called a straight edge and α-compass. In construction, where measurements are also required, we may use a graduated scale and protractor also.

3. Basic Constructions
(I) To construct the bisector of a given angle
Given: An ∠ABC.
Required: To construct it bisector.
Steps of Construction:
(i) Taking B as centre and any radius, draw an arc to intersect the rays BA and BC, say at E and D, respectively.
(ii) Next, taking D and E as centres and with the radius more than \frac { 1 }{ 2 } DE, draw arcs to intersect each other, say at F.
(iii) Draw the ray BF. This ray BF is the required bisector of the ∠ABC.
Constructions Class 9 Notes Maths Chapter 12 1
Proof: Join DF and EF.
In ΔBEF and ΔBDF,
BE = BD (Radii of the same arc)
EF = DF (Arcs of radii)
BF = BF (Common)
Therefore, ΔBEF = ΔBDF (SSS rule)
This gives ∠EBF = ∠DBF (CPCT)

(II) To construct the perpendicular bisector of a given line segment
Given: A line segment AB.
Required: To construct its perpendicular bisector.
Constructions Class 9 Notes Maths Chapter 12 2
Steps of Construction:
(i) Taking A and B as centres and radius more than \frac { 1 }{ 2 } AB, draw arcs on both sides of the line segment AB (to intersect each other).
(ii) Let these arcs intersect each other at P and Q. Join PQ.
(iii) Let PQ intersect AB at the point M. Then, line PMQ is the required perpendicular bisector of AB.
Proof: Join A and B to both P and Q to form AP, AQ, BP and BQ.
In ΔPAQ and ΔPBQ,
AP = BP (Arcs of equal radii)
AQ = BQ (Arcs of equal radii)
PQ = PQ (Common)
Therefore, ΔPAQ = ΔPBQ (SSS rule)
So, ∠APM = ∠BPM (CPCT)
Now, in ΔPMA and ΔPMB,
AP = BP (As before)
PM = PM (Common)
∠APM = ∠BPM (Proved above)
Therefore, ΔPMA = ΔPMB (SAS rule)
So, AM = BM and ∠PMA = ∠PMB
As ∠PMA + ∠PMB = 180° (Linear pair axiom)
We get, ∠PMA = ∠PMB = 90°
Therefore, PM, i.e., PMQ is the perpendicular bisector of AB.

(III) Constructs an angle of 60° at the initial point of a given ray
Given: A ray AB with initial point A.
Required: To construct a ray AC such that ∠CAB = 60°.
Constructions Class 9 Notes Maths Chapter 12 3
Steps of Construction:
(i) Taking A as the centre and some radius, draw an arc of a circle which intersects AB, say at a point D.
(ii) Taking D as the centre and with the same radius as before, draw an arc intersecting the previously drawn arc, say at a point E.
(iii) Draw the ray AC passing through E. Then ∠CAB required the angle of 60°.
Proof: Join DE.
Then, AB = AD = DE (By construction)
Therefore, ΔEAD is an equilateral triangle and the ∠EAD which is the same as ∠CAB is equal to 60°.

4. Rules of Congruency of Two Triangles

  • SAS Two triangles are congruent if any two sides and the included angle of one triangle are equal to any two sides and the included angle of the other triangle.
  • SSS Two triangles are congruent if the three sides of one triangle are equal to the three sides of the other triangle.
  • ASA Two triangles are congruent if any two angles and the included side of one triangle are equal to the two angles and the included side of the other triangle.
  • RHS Two right triangles are congruent if the hypotenuse and a side of one triangle are respectively equal to the hypotenuse and a side of the other triangle.

5. The uniqueness of a Triangle
A triangle is unique, if

  • two sides and the included angle is given,
  • three sides are given,
  • two angles and the included side is given and
  • in a right triangle, hypotenuse and one side are given.

6. Requirement for the Construction of a Triangle: For constructing a triangle, at least three parts of a triangle have to be given hut, not all combinations of three parts and sufficient for the purpose, e.g., if two sides and an angle (not the included angle) are given, then it is not always possible to construct such a triangle uniquely.

7. Some Constructions of Triangles
(I) To construct a triangle, given its base, a base angle and sum of other two sides
Given: The base BC, a base angle, say ∠B and the sum AB + AC of the other two sides of a ΔABC.
Required: To construct the ΔABC.
Constructions Class 9 Notes Maths Chapter 12 4
Steps of Construction:
(i) Draw the base BC and at the point B make an angle, say XBC equal to the given angle.
(ii) Cut a line segment BD equal to AB + AC from the ray BX.
(iii) Join DC and make an angle DCY equal to ∠BDC.
(iv) Let CY intersect BX at A (see figure).
Justification
Base BC and CB are drawn as given.
Next in ΔACD,
∠ACD = ∠ADC (By construction)
AC = AD (Sides opposite to equal angles of a triangle are equal)
AB = BD – AD = BD – AC
⇒ AB + AC = BD

Alternative Method
(i) Draw the base BC and at the point B make an angle, say XBC equal to the given angle.
(ii) Cut a line segment BD equal to AP + AC from the ray BX.
(iii) Join DC.
(iv) Draw perpendicular bisector PQ of CD to intersect BD at a point A.
(v) Join AC.
Then, ABC is the required triangle.
Constructions Class 9 Notes Maths Chapter 12 5
Justification
Base BC and CB are drawn as given.
A lies on the perpendicular bisector of CD.
AD = AC
AB = BD – AD = BD – AC
AB + AC = BD
Remark: The construction of the triangle is not possible if the sum AB + AC < BC.

(II) To construct a triangle given its base, a base angle and the difference of the other two sides
Given: The base BC, a base angle, say CB and the difference of other two sides AB – AC or AC – AB.
Required: To construct the ΔABC.
Constructions Class 9 Notes Maths Chapter 12 6
There are the following two cases
Case (I): Let AB > AC, i.e., AB – AC is given.
Steps of Construction:
(i) Draw the base BC and at point B make an angle, say XBC equal to the given angle.
(ii) Cut the line segment BD equal to AB – AC from ray BX.
(iii) Join DC and draw the perpendicular bisector, say PQ of DC.
(iv) Let it intersect BX at a point A. Join AC.
Then, ABC is the required triangle.

Justification
Base BC and ∠B are drawn as given.
The point A lies on the perpendicular bisector of DC.
AD = AC
So, BD = AB – AD = AB – AC

Case (II): Let AB < AC i.e., AC – AB is given.
Constructions Class 9 Notes Maths Chapter 12 7
Steps of Construction:
(i) Draw the base BC and at point B make an angle, say XBC equal to the given angle.
(ii) Cutline segment BD equal to AC – AB from the line BX extended on an opposite side of line segment BC.
(iii) Join DC and draw the perpendicular bisector, say PQ of DC.
(iv) Let PQ intersect BX at A. Join AC.
Then, ABC is the required triangle.
Justification
Base BC and CB are drawn as given.
The point A lies on the perpendicular bisector of DC.
AD = AC
So, BD = AD – AB = AC – AB

(III) To construct a triangle, given its perimeter and its two base angles
Given: The base angles, say ∠B and ∠C and BC + CA + AB.
Required: To construct the ΔABC.
Steps of Construction:
(i) Draw a line segment, say XY equal to BC + CA + AB.
(ii) Make angles LXY equal to ∠B and MYX equal to ∠C.
(iii) Bisect ∠LXY and ∠MYX. Let these bisectors intersect a point A.
Constructions Class 9 Notes Maths Chapter 12 8
(iv) Draw perpendicular bisectors PQ of AX and RS of AY.
(v) Let PQ intersect XY at B and RS intersect XY at C. Join AB and AC.
Constructions Class 9 Notes Maths Chapter 12 9
Then, ABC is the required triangle.

Justification
B lies on the perpendicular bisector PQ of AX.
∴ XB = AB
C lies on the perpendicular bisector RS of AY.
∴ CY = AC
This gives
BC + CA + AB = BC + XB + CY = XY
Again, ∠BAX + ∠AXB (in ΔAXB, AB = XB)
and ∠ABC = ∠BAX + ∠AXB = 2∠AXB = ∠LXY
Next, ∠CAY = ∠AYC (in ΔAYC, AC = CY)
and ∠ACB = ∠CAY + ∠AYC = 2∠AYC = ∠MYX
Thus, we have what is required.

We hope the given CBSE Class 9 Maths Notes Chapter 12 Constructions Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 12 Constructions, drop a comment below and we will get back to you at the earliest.

The post Constructions Class 9 Notes Maths Chapter 12 appeared first on Learn CBSE.

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity

$
0
0

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity are part of NCERT Solutions for Class 10 English Main Course Book. Here we have given CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity.

CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity

TEXTUAL EXERCISES

Question 1.
‘Whenever our nation faces a threat, or some major calamity happens, don’t we all stand together with a sense of emotional oneness to fight against evil forces and unnatural situations ?’
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 1
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 1.1
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 1.2
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 1.3
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 1.4

Question 2.
Film review
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 2
Question 3.
Common words/phrases used in film reviews
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 2

Question 4.
Writing a Film Review
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 2

Question 5.
Now write your own film review on ‘Chak de India’, ‘Lagaan’, or ‘Mother India’. The teacher could arrange for the screening of the film if need be.

The class could also decide on any other regional film that portrays the spirit of National Integration.

Highlight the aspect of national integration that has been portrayed in the film.

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 2
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 5
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 5.1

Question 6.
Working in groups of four, discuss the ways in which the following have integrated India :

  1. Music—Jai Ho / Vande Mataram
  2. Food—North Indian!South Indian
  3. Fashion—Salwar kameezs / lehengas / Achkan / Dhoti Kurta
  4. Occupation and trade—Job opportunities
  5. Relationships / Marriage

Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 6
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity 6.1

We hope the NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity help you. If you have any query regarding CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 3 Spirit of Unity appeared first on Learn CBSE.

NCERT Solutions for Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show

$
0
0

NCERT Solutions for Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show are part of NCERT Solutions for Class 9 English. Here we have given CBSE Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show.

CBSE 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show

Here is another challenging and innovative project for you to work on ; you will produce and present a video show.
Question 1.
You will watch a CD or a TV programme which will give you ideas for developing and presenting your own programme.
Answer :
Students can gather various ideas after going through the radio programme given above. A video show will equally be possible for them to be made on these lines.

Under Question 1. students shall watch a CD or a TV programme. This will give them ideas for developing and presenting their own programme as given above in verbal form.

Under Question 2. students shall discuss the difference between a Radio Show and a Video Show. Some hints given below shall enable them to know and understand this difference.

Radio Show : It is purely an audio programme, that is, one can hear it only as we listen to various Radio programmes.
Video Show : A Video Show means a show that has more video content than the audio one. The interlinking between various episodes is provided by the presenter. He acts like a go-between between various incidents joined together in the Video Show.

Students can make their own video show by using their handycam. But before that they will have to prepare a kind of plan and select a topic. Making a Video Show is like producing or making a documentary film on a particular subjec

Question 2.
Before you watch the recording the second time, in groups discuss the difference between a Radio Show and a Video Show.
Answer :
Students can gather various ideas after going through the radio programme given above. A video show will equally be possible for them to be made on these lines.

Under Question 1. students shall watch a CD or a TV programme. This will give them ideas for developing and presenting their own programme as given above in verbal form.

Under Question 2. students shall discuss the difference between a Radio Show and a Video Show. Some hints given below shall enable them to know and understand this difference.

Radio Show : It is purely an audio programme, that is, one can hear it only as we listen to various Radio programmes.
Video Show : A Video Show means a show that has more video content than the audio one. The interlinking between various episodes is provided by the presenter. He acts like a go-between between various incidents joined together in the Video Show.

Students can make their own video show by using their handycam. But before that they will have to prepare a kind of plan and select a topic. Making a Video Show is like producing or making a documentary film on a particular subject.

Question 3.
Complete the following table and then compare it with your partner.
VIDEO CD :
NCERT Solutions for Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 1 Radio Show 6
Is there enough variety of content ?
Answer :
Students to complete the table on their own after having made a Video Show.

Question 4.
Now it is your turn. Your class will be divided into groups of ten students. Each group will produce a programme. Keep in, mind the following.

  • Each group will invent their own channel. Give it a name and logo. The duration of the programme should be about 10 – 15 minutes.
  • Your presentation should be well-planned; it should include an introduction, a news item, a weather-report, and an advertisement. (You can take hints from Question 3)

Each group will have the following :
Two Anchors, Script Writer, Director, News Reader, Camera person and assistant, Cast, Reporter, Recorder and event manager.
Anchors : Present the programme in a lively manner.
Script Writer : Ensure the final draft of the script is ready before you start recording.
Director : Ensure the programme has enough variety.
News Reader : Report school news, current news and neighbourhood news.
Camera person and assistant : Capture the items on camera.
Cast : Each group will choose an item for the programme. Discuss it with the director ; write your script, making sure you do not exceed the allocated duration. Then rehearse your item, so that it is perfect when the programme is actually produced.
Reporter : Will help the news reader in compiling the news.
Recorder : Record the audio part.
Producer : Decide on a day when the whole programme is to be produced and assist in any way required

Event manager :

  • Ensure the programme has enough variety of content.
  • Supervise the work of the scipt writer
  • Help edit the recording.
  • Ensure that the required hardware – tape-recorder, video camera, charger, CD etc are available. Now enact or sit back and enjoy the programme.

NCERT Solutions for Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 1 Radio Show 5
Answer :
Project :
The Class IX Video Show is all about making a Video Show like a Radio Show. Question 4. is all about producing such a video show. Students may read the important points given under Question 2, Question 3, and Question 4. and proceed ahead with the task of producing this Video Show under the guidance of their teachers.

We hope the NCERT Solutions for Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show help you. If you have any query regarding CBSE Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 9 English Main Course Book Unit 4 Radio and Video Show Chapter 2 Video Show appeared first on Learn CBSE.

Surface Areas and Volumes Class 9 Notes Maths Chapter 13

$
0
0

CBSE Class 9 Maths Notes Chapter 13 Surface Areas and Volumes Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 13 Surface Areas and Volumes.

CBSE Class 9 Maths Notes Chapter 13 Surface Areas and Volumes

1. Cuboid: A figure which is surrounded by six rectangular surfaces is called cuboid.
The opposite surface of a cuboid is equal and parallel.

A cuboid has 12 edges and 8 corners. Each corner of a cuboid is called the vertex of a cuboid. The line segment joining the opposite vertices is called the diagonal of a cuboid. There are four diagonals in a cuboid.
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 1
Volume of cuboid = Length × Breadth × Height = l × b × h
Lateral surface area = 2 (Length + Breadth) × Height = 2 (l + b) × h
Total surface area = 2 (Length × Breadth + Breadth × Height + Height × Length) = 2 (lb + bh + hl)
Total length of cuboid = 4 (l + b + h)
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 2

2. Cube: A cuboid, whose length, breadth and height are same is called a cube.
A cube has six surfaces, twelve edges, eight corners and four diagonals.
Volume of cube= (Side)3 = l3
Lateral surface area = 4 × (Side)2 = 4l2
Total surface area = 6 × (Side)2 = 6l2
Total length of cube = 12l
Diagonal of cube = √3 l

3. Right Circular Cylinder: A right circular cylinder is considered as a solid generated by the revolution of a rectangle about one of its sides.
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 3
The volume of a cylinder = πr2h
Curved surface area or lateral surface area = 2πrh
Total surface area = Curved surface + 2 × Base area = 2πrh + 2πr2 = 2πr(h + r)

4. Cone: A right circular cone is a solid generated by revolving of a triangle about one of its sides (other than hypotenuse).
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 4
Volume of cone = \frac { 1 }{ 3 } πr2h
Curved surface area or lateral surface area = πrl
Total surface area = Curved surface area + Base area
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 5

5. Sphere: A solid which is surrounded by a curved surface and each point of the surface is the same distance from a fixed point. The fixed point is called the centre of the sphere. The line segment joining from the centre of the sphere to any point of the surface is called the radius of the sphere.
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 6

6. Hemisphere: A plane passing through the centre of a sphere divides the sphere into two equal parts. Each part is called a hemisphere.
Surface Areas and Volumes Class 9 Notes Maths Chapter 13 7
Volume of hemisphere = \frac { 2 }{ 3 } πr3
The curved surface area of hemisphere = 2πr2
Total surface area of hemisphere = 2πr2 + πr2 = 3πr2

We hope the given CBSE Class 9 Maths Notes Chapter 13 Surface Areas and Volumes Pdf free download will help you. If you have any query regarding NCERT Class 9 Maths Notes Chapter 13 Surface Areas and Volumes, drop a comment below and we will get back to you at the earliest.

The post Surface Areas and Volumes Class 9 Notes Maths Chapter 13 appeared first on Learn CBSE.

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara

$
0
0

NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara are part of NCERT Solutions for Class 10 English Main Course Book. Here we have given CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara.

CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara

TEXTUAL EXERCISES

Question 1.
Jog your memory for interesting and memorable slogans you may have come across :
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 1

Question 2.
Look at the pictures given below, frame short, interesting and creative slogans :
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 1
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 2

Question 3.
Work with your partner and write six prominent features of Indian identity.
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 3

Question 4.
‘Ek sur’ (meaning One Tune) or ‘Mile Sur Mera Tumhara’ as it is better known, is an Indian song and accompanying video feature promoting national integration and unity in diversity.
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 4
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 4.1

Question 5.
Arrange a video viewing of both the versions of ‘Mile Sur\ Later you may produce your own version of the song for presentation in the morning assembly.
Answer:
NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara 5

We hope the NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara help you. If you have any query regarding CBSE Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 10 English Main Course Book Unit 6 National Integration Chapter 4 Mile Sur Mera Tumhara appeared first on Learn CBSE.

Textbooks Solutions for CBSE & ICSE Board of Class 6 to 12 – Free PDF Solutions

$
0
0

NCERT Textbooks, RD Sharma Textbooks, RS aggarwal and Lakhmir Singh’s textbooks are used by a huge number of students across India for self-learning and exam preparation. Lakhmir Singh Physics Class 10 Solutions are ideal for the student who is appearing for his/her Class 10 CBSE exam. The Lakhmir Singh Physics Class 10 Solution in free PDF download isn’t just for an average student. If you’ve always craved for a thorough understanding of different Physics concepts and wanted to build your foundations from scratch, then these solutions are your go-to resource for learning. The Lakhmir Singh Physics Class 10 Solutions in free PDF download can be accessed by anyone with a basic internet connection by simply visiting LearnCBSE.in.

You can also read NCERT Solutions, RD Sharma Solutions, RS Aggarwal and Lakhmir Singh Textbook Solutions from LearnCBSE.in

NCERT Solutions for Class 1 to 12

RD Sharma Solutions

Lakhmir Singh Solutions

The post Textbooks Solutions for CBSE & ICSE Board of Class 6 to 12 – Free PDF Solutions appeared first on Learn CBSE.


Electricity Class 10 Notes Science Chapter 12

$
0
0

CBSE Class 10 Science Notes Chapter 12 Electricity Pdf free download is part of Class 10 Science Notes for Quick Revision. Here we have given NCERT Class 10 Science Notes Chapter 12 Electricity.

CBSE Class 10 Science Notes Chapter 12 Electricity

Conductor: The material which can allow the flow of electrons through itself is called the conductor. It has a large number of free electrons. It offers low opposition in the flow of current.

Insulator: The material which does not allow the flow of electrons through itself is called insulator. It has less or no free electrons. It offers high opposition in the flow of current.

Electric Current: The amount of flow charge through any cross-sectional area of a conductor in unity time is called Electric Current.
It is represented by ‘I’
I = \frac { Q }{ T }

Unit of Electric Current: It is CS-1 (coulomb per second) or Ampere (A). Electric Current is a scalar quantity. It is measured by an ammeter.

Direction: The direction of conventional current (or practical current) is opposite to the flow of electrons.

Electric potential: Electric Potential at any point in the electric field is defined as the amount of work done to bring the unit positive charge from infinity (from outside the electric field) to that point.
V =\frac { W }{ Q }, S.I. unit of Electric Potential is JC-1 or volt (V). It is a scalar quantity. The +ve charge flows from higher to lower potential. The -ve charge flows from lower to a higher potential. The difference of electric potential between any two points in the electric field is called Electric Potential difference. It is known as a voltage which is equal to the work done per unit charge between two points against the static electric field.
VAB = VA – VB = \frac { { W }_{ AB } }{ Q }
Electric Potential difference is measured by a voltmeter.

Ohm’s Law: According to this law “Under the constant physical condition the potential difference across the conductor is directly proportional to the current flowing through the conductor.”
V ∝ I
V = IR …[Where R is proportionality constant called resistance of conductor]
⇒ I = \frac { V }{ R }
R depends upon nature, geometry and physical condition of the conductor.

The heat generated by electric current: The potential difference between two points in an electrical field is equal to the work done in moving a unit charge from one point to another.
Then, work is done, W = VQ and Q = I × t
W = V × I × t
From Ohm’s Law, we know that
V = IR
W = IR × I × t = I2.Rt
Since heat produced by the electric current is equal to work done, W
H = W
⇒ H (heat) = I2Rt Joule.

Resistance: Ratio of the applied voltage to the current flowing in the conductor is called resistance of the conductor.
⇒ R = \frac { V }{ I }
S.I. Unit of resistance is VA-1 or ohm (Ω).
Resistance is the opposition offered by the conductor in the flow of current.
Practically it is
R ∝ L (L is the length of a conductor)
R ∝ 1/A (A is the area of a conductor)
So, R ∝ L/A
R = ρL/A …[Where p is proportionality constant called specific resistance of conductor
It only depend upon nature (material) and temperature of conductor.

Specific resistance or Resistivity = ρ = RA /L
It’s S.I. Unit is Qm

Combination of resistance:

  • In this combination the current across every component is same but potential across every component is different.
  • If resistance R1, R2 and R3 are connected in series with a battery of Potential V, then equivalence resistance of the combination
    R = R1 + R2 + R3

The parallel combination of resistance:

  • In this combination the current across every component is different. But potential across every component is the same.
  • If resistance R1, R2 and R3 are connected in parallel with a battery of Potential V, then equivalence resistance of combination
    \frac { 1 }{ R } =\frac { 1 }{ { R }_{ 1 } } +\frac { 1 }{ { R }_{ 2 } } +\frac { 1 }{ { R }_{ 3 } }

Electric Energy is amount of work done to maintain the continuous flow of electric current in the circuit.
Its S.I. unit is joule (J).

Electric power (P): The electric work done per unit time is called electric power.
Electric Power = \frac { Electric\quad work\quad done }{ Time\quad taken }
or P = \frac { W }{ t }
Electric power is also defined as the electric energy consumed per unit time.
P = \frac { E }{ t }
S.I. unit of electric power is Watt. When one joule of energy is used for one second, electric power is equal to one watt.

Derivation of formula for electric power:
We know that electric work done, W = V × I × t or P = \frac { VIt }{ t }
P = VI
Electric power in watts = Volts × ampere
Also V = IR …[According to Ohm’s Law]
So P = IR × I
P = I2R
We know that I = \frac { V }{ R }
P = (\frac { V }{ R })2 × R = \frac { { V }^{ 2 } }{ R } Watt
The maximum value of electric current that can pass through an electric appliance without damaging electric appliance is called current rating of electric appliance.

We hope the given CBSE Class 10 Science Notes Chapter 12 Electricity Pdf free download will help you. If you have any query regarding NCERT Class 10 Science Notes Chapter 12 Electricity, drop a comment below and we will get back to you at the earliest.

The post Electricity Class 10 Notes Science Chapter 12 appeared first on Learn CBSE.

Geography Class 12 Important Questions Chapter 4 Human Development

$
0
0

Geography Class 12 Important Questions Chapter 4 Human Development is part of Geography Class 12 Important Questions. Here we have given Geography Class 12 Important Questions Chapter 4 Human Development.

Geography Class 12 Important Questions Chapter 4 Human Development

1 Mark Questions

Questions 1.
“Leading a long and healthy life is an important aspect of human development.” Give an argument to support this statement. (HOTS, Delhi 2ois)
Answer:
Life is meaningful when people are healthy, able to develop their talents, participate in society and be free to achieve their goals.
This kind of life is an important aspect of human development.

Questions 2.
Define the concept of human development? (All India 201B)
Answer:
Human development is defined as the type of development that enlarges people’s choices and improves their lives.

Questions 3.
Which country has proclaimed ‘Gross National Happiness’ as the measure of a country’s progress? (All India 2014)
Answer:
The country to proclaim Gross National Happiness (GNH) as the measure of a country’s progress is Bhutan.

Questions 4.
Name the country which has the highest rank in the Human Development Index. (All India 2014)
Answer:
The country standing highest in the human development index is Norway.

Questions 5.
Which state of India has the highest rank in the Human Development Index (HDI) value? (All India 2014)
Answer:
Kerala state has the highest rank in HDI.

Questions 6.
Mention any two key areas of measuring human development? (Delhi 2013)
Answer:
The two key areas are:

  • Health
  • Education

Questions 7.
Which is the most significant aspect of human development? (Delhi 2012)
Answer:
Education, healthy life and resources are the most significant aspects of human development.

3 Marks Questions

Questions 8.
Explain any three human values which are required to empower socially and economically disadvantaged people. (HOTS, Delhi 2013)
OR
“Equity i§ one of the most important pillars of human development.” Explain any three human values that are required to give equal access to opportunities to everybody. (HOTS. All India 2013)
Answer:
Equity means the availability of equal opportunities to everyone. If everybody has equal access to available opportunities, then a quality life is possible. The three human values required to give equal access to everybody are as follows:

  • Providing equal opportunities without any discrimination of caste or race.
  • Equal opportunities should be available irrespective of gender.
  • Equal opportunities without any discrimination of income or class.

Questions 9.
“Development is a qualitative change, which is always value positive.” Support this statement with any three suitable arguments. (HOTS, Delhi 2012)
Answer:
Development means a qualitative change which is always value positive. This means that development cannot take place unless there is an increment or addition to the existing conditions. Development occurs when positive growth takes place.
The given statement can be supported by the following three arguments:

1. The term ‘development’ refers to a qualitative shift that is always value positive. It occurs when there is a positive change in quality over a time frame. Although development is always influenced by growth but only in the case of positive and qualitative growth, e.g. if a child grows by height but is not mentally able, then growth is not accompanied with development.

2. Countries with better economic conditions are more developed while poor nations a^e less developed. But in many cases, the benefit of economic growth does not reach the common man. Quality of life of the people of a country, the opportunities they have, freedom of living, etc are important aspects of development.

3. Dr Mahbub-ul-Haq described human development as development that enlarges people’s choice and improves their lives. He believed that people are central to all development and the main aim of development is to create a situation and environment where people get meaningful lives. The meaningful life means a life that must be full of objectivity, that includes health, participation in the societal helm of affairs and focuses on people’s goals.

Questions 10.
Explain the key areas of human development. (Delhi 2012)
OR
Explain the three main areas of measuring human development. (All Indio 2008)
Answer:
The key areas of human development are health, housing and access to resources.
They are explained as follows:
Health Indicator Indicator of health is measured through life expectancy at birth, that shows if people have longer and healthier lives.
Education Indicator Level of education is seen through gross enrollment ratio and an adult literacy rate that represents access to knowledge.

Access to Resources The indicator of access to resources is purchasing power in terms of US dollars. These are the key areas or the indicators through which human development is measured.

Questions 11.
Differentiate between ‘growth and development’ with an example. (All India 2012)
Answer:
Growth refers to quantitative changes. Its value can be neutral, positive or negative. Development refers to qualitative changes and its value is always positive. This is because development cannot take place unless there is an increase or a rise in existing conditions thus leading to positive changes. For e.g. the population of a city increases from 1 lakh to 2 lakh over a period of time. This is growing as the number has increased.

However, if the basic necessities like food, housing, education and sanitation facilities remain constant, then the growth is not accompanied by development.

Questions 12.
Explain any three features of welfare approach of human development, (AH Indio 2012)
OR
Explain any three characteristics of ‘welfare approach’ of human development in the world. (Delhi 2010)
Answer:
The characteristics of the welfare approach are as follows:
1. The welfare approach of human development is an approach which looks at human beings as beneficiaries or targets of all development activities.
2. According to this approach, the government is responsible for increasing levels of human development by increasing expenditure on welfare such as on education, health, housing, sanitation etc.
3. In this approach, people are passive recipients of the beneficiaries of human development, while the government is the provider of those beneficiaries.

Questions 13.
Explain the concept of ‘Equity’ and ‘Sustainability’ as the pillars of human development. (Delhi 2011)
Answer:
Just as any building is supported by pillars, the idea of human development is supported by the concepts of equity and sustainability. Both are explained below:
Equity It means availability of equal opportunities to an individual. The available opportunities have equal access without any discrimination on the ground of gender, race, income and caste. A quality life is possible if access to resources is provided on the basis of being a human.

Sustainability It refers to continuity in the availability of opportunities. Human development is possible when opportunities are available to the present and future of a country. It must be ensured that equal access to a resource should be available to the next generation.

Questions 14.
Explain the ‘basic needs approach’ to human development in the world. (Delhi 2010)
Answer:
The basic needs approach to human development in the world was initially proposed by the International Labour Organisation (ILO). In this approach, the question of human choices is ignored as the main emphasis is laid on the provision of basic needs. These basic needs are the necessity that enables a person to survive and fulfil the essential requirements. There are six basic needs identified in this approach.

They are as follows:
Health Proper health required to maintain a healthy weight.
Education Provision of schools and colleges.
Food Nutritious food to fulfil daily requirements.
Water Supply Provision of clean drinking water.
Sanitation Proper sanitation facility to maintain hygiene.
Housing Proper dwelling place with basic facilities.

5 Marks Questions

Questions 15.
“The size of a territory and per capita income are not directly related to human development.” Support the statement with examples, HOTS? (AH India 2017)
Answer:
Human Development is the process of widening people’s choices and the level of well being they achieve. According to the United National Development Programme, long and healthy life, education and a decent standard of life are the most important elements of human development.

The indicators of human development are:
Health Indicators Health is a major component of human development. It is measured in terms of birth rate and death rate.
Economic Indicators An essential part of human development is economic productivity. Growth in an economy and economic productivity can be assessed with the help of gross national product and per capita income.
Life Expectancy With the declining vital rates life expectancy of birth has gone up as it was only 37.1 for male and 36.2 years for a female in 1951. It wants up to 62.30 years and 65.27% years respectively during 1996.
Social Indicators Education is universally recognised as a major component of human development. As such a minimum level of literacy sums to be essential for a population to break out of the unit circle of poverty.

The Economic structure of a country is the most important indicator of human development. The size of a territory does not play any role in it. The advanced countries have a higher level of economic prosperity while the less developed and backward countries are at a lower level of economic growth.

The developed countries per capita income is indirectly related to economic structure and overall all these indicators make the Human Development Index of a country. The size of a territory and per capita income are not directly related to human development but it does play some role.

Questions 16.
What is human development? Analyse the four pillars of human development. All India 2017
OR
What is ‘human development’? Explain the four pillars of human development. Delhi 2015
Answer:
For the definition of human development,
refer to Q. No. 2.
Human development has four concepts such as equity, sustainability, productivity and empowerment. These concepts are based on human development and are called pillars of human development such as:

Equity It means availability of equal opportunities to an individual. The available opportunities have equal access without any discrimination on the ground of gender, race, income and caste. A quality life is possible if access to resources is provided on the basis of being a human.

Sustainability It refers to continuity in the availability of opportunities. Human development is possible when opportunities are available to the present and future of a country. It must be ensured that equal access to a resource should be available to the next generation.

Productivity Human labour productivity or productivity in the context of human work refers to productivity regarding human development. A nation should invest in its productive labour by providing them with better healthcare facilities, education and training. Healthy and educated people can contribute more than unhealthy and illiterate people in development.

Empowerment
It refers to having the power of making choices. Freedom and capabilities can enhance the power and capacity to make a choice. The government can enhance empowerment through good governance and people-oriented policies.

3 Map Based Question

Questions 17.
In the given political map of the world, identify these features with the help of the information given below and write their correct names on the lines drawn near them.
(i) A country having the lowest rank in the Human Development Index 2003. (All India 2015)
(ii) A country having the highest rank in the Human Development Index 2003. (Delhi 2015, All Indio 2012)

3 Value Based Questions

Questions 18.
The concept of human development was introduced by Dr Mahbub-ul-Haq. Dr Haq has described human development as development that enlarges people’s choices and improves their lives. People are central to all development under this concept. These choices are not fixed but keep on changing. The basic goal of development is to create conditions where people can live meaningful lives.
(i) Who introduced the concept of human development?
(ii) Which value is focused while calculating human development?
Answer:
(i) Dr Mahbub-ul-Haq introduced the concept of human development.
(ii) Following values are focused while calculating human development:

  • National Pride
  • Organisational Skill

Questions 19.
Equity is one of the most important pillars of human development. Give any three human values that are required to give equal success to the opportunity to everybody.
Answer:
Following values are required to give equal success to an opportunity to everybody:

  • Equality
  • Sustainability
  • Empowerment

We hope the Geography Class 12 Important Questions Chapter 4 Human Development help you. If you have any query regarding Geography Class 12 Important Questions Chapter 4 Human Development, drop a comment below and we will get back to you at the earliest.

The post Geography Class 12 Important Questions Chapter 4 Human Development appeared first on Learn CBSE.

Magnetic Effects of Electric Current Class 10 Notes Science Chapter 13

$
0
0

CBSE Class 10 Science Notes Chapter 13 Magnetic Effects of Electric Current Pdf free download is part of Class 10 Science Notes for Quick Revision. Here we have given NCERT Class 10 Science Notes Chapter 13 Magnetic Effects of Electric Current.

CBSE Class 10 Science Notes Chapter 13 Magnetic Effects of Electric Current

Magnetic field: The area around a magnet in which other magnet feels force of attraction or repulsion is called Magnetic field.

Magnetic field lines: The closed curved imaginary lines in the magnetic field which indicate the direction of motion of north pole in the magnetic field if a magnet is free to do so.

Properties of magnetic field lines.

  • Magnetic Field lines originate from the north pole of a magnet and end at its south pole.
  • Magnetic Field lines are denser near the poles but rarer at other places.
  • The Magnetic Field lines do not intersect one another.

Oersted’s experiment: According to this experiment “A current carrying wire creates a magnetic field around it. The direction of magnetic field depends on the direction of current in conductor.”

  • Magnetic field pattern due to straight current carrying conductor are concentric circles whose center lie on the wire.
  • The direction of magnetic field due to straight current carrying conductor can be determined by Right hand thumb rule.

Right hand thumb rule: According to this rule “if current carrying conductor is held in the right hand in such a way that thumb indicate the direction of current, then the curled finger indicates the direction of magnetic field lines around conductor.”

Magnetic field pattern due to current carrying loop: The Magnetic field lines are circular near the current-carrying loop. As we move away from the loop, field lines form bigger and bigger circles. At the center of the circular loop, the magnetic field lines are straight.

The solenoid is an insulated and tightly wound long circular wire having large number of turns whose radius is small in comparison to its length. Magnetic field produced by a solenoid is similar to the magnetic field produced by a bar magnet.

Current carrying solenoid is called an electromagnet.

Properties of magnetic lines of force or magnetic field lines.

  • These lines originate from the north pole and end at the south pole.
  • The magnetic field lines of a magnet form a continuous closed loop.
  • Two magnetic lines of force do not intersect each other.
  • The tangent at any point on the magnetic line gives the direction of the magnetic field at the point.

Fleming’s left hand rule: According to this rule, “if the thumb, forefinger and middle finger of the left hand are stretched perpendicular to each other and if the fore-finger gives the direction of magnetic field, middle finger gives the direction of current, then the thumb will give the direction of motion or the force acting on the current-carrying conductor.”

Principle of an electric motor: A motor works on the principle that when a rectangular coil is placed in a magnetic field and current passes through it, a force acts on the coil which rotates it continuously.
When the coil rotates, the shaft attached to it also rotates. In this way the electrical energy supplied to the motor is converted into the mechanical energy of rotation.

Principle of an electric generator: It is based on the principle of electromagnetic induction. It states that “an induced current is produced in a coil placed in a region where the magnetic field changes with time.” The direction of induced current is given by Fleming’s right-hand rule. An electric generator converts mechanical energy into electrical energy.

Electromagnetic induction: The phenomenon of setting up of an electric current or an induced e.mi. by changing the magnetic lines of force by a moving conductor is called electromagnetic induction.

Maxwell’s right hand thumb rule: The direction of the current is given by Maxwell’s right-hand thumb rule, “If the current carrying conductor is gripped with the right hand in such a way that the thumb gives the direction of the current, then the direction of the fingers gives the direction of the magnetic field produced around the conductor.

Fleming’s left-hand rule: The direction of motion of a conductor in a magnetic field is given by Fleming’s left-hand rule. According to this rule, if the thumb, forefinger and middle finger of the left hand are stretched perpendicular to each other and if fore-finger gives the direction of the magnetic field and the middle finger gives the direction of current then, the thumb will give the direction of the motion of the conductor carrying the current.

Fleming’s right-hand rule: The direction of the induced current is given by Fleming’s right-hand rule. According to this rule if the thumb, forefinger and middle finger of the right hand are stretched perpendicular to each other and if the fore-finger gives the direction of the magnetic field and the thumb gives the direction of motion, then the middle finger will give the direction of the induced current in the conductor.

We hope the given CBSE Class 10 Science Notes Chapter 13 Magnetic Effects of Electric Current Pdf free download will help you. If you have any query regarding NCERT Class 10 Science Notes Chapter 13 Magnetic Effects of Electric Current, drop a comment below and we will get back to you at the earliest.

The post Magnetic Effects of Electric Current Class 10 Notes Science Chapter 13 appeared first on Learn CBSE.

Sources of Energy Class 10 Notes Science Chapter 14

$
0
0

CBSE Class 10 Science Notes Chapter 14 Sources of Energy Pdf free download is part of Class 10 Science Notes for Quick Revision. Here we have given NCERT Class 10 Science Notes Chapter 14 Sources of Energy.

CBSE Class 10 Science Notes Chapter 14 Sources of Energy

Need for Energy: The ability of a body to do work is called energy. No activity will occur without energy. So energy is required in all walks of life.

Characteristics of a good source of energy.

  • It should be able to do a large amount of work for each unit of mass or volume.
  • It should be easily accessible.
  • It should be easily transported.
  • It should be economical.

Conventional Sources of Energy.
The sources of energy which have been in use since a long time are called conventional sources of energy. For example, Coal, petroleum, natural gas, hydel energy, wind energy and nuclear energy are considered to be the conventional sources of energy. Firewood is also a conventional source of energy but its usage is now limited to kitchens in rural India.

Fossil Fuels.
Coal: Coal was formed millions of years ago. The plants got buried under swamps and due to high pressure and high temperature inside the earth; they were converted into coal. Coal is the highest used energy source in India. During the days of the steam engine, coal was used in steam engines. Moreover, coal was also used as kitchen fuel; before LPG became popular. Nowadays, coal is mainly being used in industries.

Petroleum: Petroleum was also formed millions of years ago. The animals got buried under the ocean surface and were converted into petroleum; in due course of time.
Petroleum is the third major source of energy being used today. Petroleum products are used as automobile fuel and also in the industries. Natural gas mainly comes from the oil wells and is also a major source of energy.

Non-renewable Sources of Energy.
It takes millions of years for the formation of fossil fuels. Since they cannot be replenished in the foreseeable future, they are known as non-renewable sources of energy.

Renewable Sources of Energy.
Those sources of energy which can be replenished quickly are called renewable sources of energy. Hydel energy, wind energy and solar energy are examples of renewable sources of energy.

Hydel Energy: Hydel energy is produced by utilizing the kinetic energy of flowing water. Huge dams are built over a source of water. Water is collected behind the dam and released. When the water falls on the turbine; the turbine moves; because of kinetic energy of water. Thus, electricity is generated by the turbine. Electricity; thus generated is called hydel energy or hydroelectricity.

Limitations of Hydroelectric Plants.

  • Dams can be constructed only in a limited number of places, preferably hilly areas.
  • Large areas of agricultural land and human habitation get destroyed by the cons¬truction of dams.
  • Large eco-systems get submerged under water. The vegetation which is submerged underwater rots under anaerobic conditions and gives rise to large amounts of methane which is a greenhouse gas.
  • Rehabilitation of displaced people is another major problem.

Thermal Power Plant: In a thermal power plant, coal or petroleum is used for converting water into steam. The steam is used to rim the turbine; to generate electricity.

Biomass: The material obtained from the bodies of plants and animals is called biomass.
Examples: cattle dung, sewage, crop residue, wood, etc.

Biogas: Biogas is a mixture of methane, carbon dioxide, hydrogen and hydrogen sulphide. It contains 65% of methane gas. Biogas is produced by the anaerobic degradation of bio¬mass in the presence of water but in the absence of air.

Wind Energy: Wind energy has been in use since ages. Windmills have been in use; especially in Holland; since the medieval period. Nowadays, windmills are being used to generate electricity. The kinetic energy of wind is utilized to run the turbines; which generate electricity. At present, Germany is the leading country in terms of wind energy production and India comes at number five. In India, Tamil Nadu is the largest wind energy producing state. The largest wind farm in India is near Kanyakumari; in Tamil Nadu; which generates 380 MW of electricity.

Limitations of Wind Energy: Wind farms can only be established at those places where the wind speed is high enough and is more than 15 km/hr for most parts of the year. Wind farms need to be established on large tracts of land. The fan of the windmill has many moving parts; so the cost of maintenance and repair is quite high. The initial cost of establishing a wind farm is very high.

Non-conventional Sources of Energy: Energy sources which are relatively new are called non-conventional sources of energy, e.g., nuclear power and solar energy.

Solar Energy: The sun is the main source of energy for all living beings on this earth. Even the energy in the fossil fuels has come from the sun. The sun has an endless reservoir of energy which would be available as long as the solar system is in existence. Technologies for harnessing the solar energy have been developed in recent times.

Solar Cooker: Solar cooker is very simple in design and mode of function. It is usually made from mirrors. Plain mirrors are placed inside a rectangular box. The light reflected from the plain mirrors concentrates the solar energy inside the solar cooker which generates enough heat to cook food.

Solar Furnace: Solar furnace is made like a concave mirror. Large solar furnace has many smaller mirrors to compose a very large convex mirror. The thing to be heated is placed near the focus of the mirror.

Solar Cells: Solar cells are made from silicon. The solar panel converts solar energy into electrical energy which is stored in a battery; for later use.

Limitations of Solar Energy: The technologies for harnessing solar energy are at a nascent stage. At present, the cost-benefit ratio for using solar energy is not conducive. Using solar energy is exorbitantly costly.

Tidal Energy: Due to the gravitational pull of the moon, tides happen near seashores. Water rushes up near the seashore during high tide and goes down during low tide. Dams are built near seashores to collect the water which comes during a high tide. When the water runs back to the ocean, the flow of water can be utilized to generate electricity.

Wave Energy: Waves can also be a good source of energy. Many devices are being designed and tested to produce wave energy. For example; a hollow tower is built near the seashore. When water gushes in the tube because of wave, it forces the air upwards. The kinetic energy of air in the tube is used to run a turbine. When the wave goes down; air from up goes down the tube which is also used in running the turbine.

Ocean Thermal Energy: The water at sea surface is hot during the daytime, while the water at a lower level is cold. The temperature differential in water levels can be utilized to generate energy. If the temperature differential is more than 20°C, then ocean thermal energy can be utilized from that place. For this, a volatile liquid; like ammonia; is boiled using the heat from the hot water at the surface. The steam of the volatile liquid is utilized to run the turbine to generate electricity. Colder water from the surface below is utilized to condense ammonia vapour which is then channelized to the surface to repeat the cycle.

Geothermal Energy: Heat energy from molten rocks present inside the earth created under certain favourable conditions by natural processes is called geothermal energy. It is the only type of energy which does not use solar energy.

Nuclear Energy: Nuclear fission is the process during which a bigger nucleus breaks to produce two smaller nuclei. The process generates a huge amount of energy. This phenomenon is utilized in nuclear power plants. Nuclear power is safest for the environment but the risk of damage due to accidental leaks of radiation is pretty high. Further, the storage of nuclear waste is a big problem because of the potential risk of radiation involved.

Advantages of nuclear energy.

  • A very large amount of energy can be produced by a nuclear process on using very small amount of nuclear fuel in a nuclear reactor.
  • The energy so produced can be easily transformed into electrical energy.
  • It does not produce harmful gases.

We hope the given CBSE Class 10 Science Notes Chapter 14 Sources of Energy Pdf free download will help you. If you have any query regarding NCERT Class 10 Science Notes Chapter 14 Sources of Energy, drop a comment below and we will get back to you at the earliest.

The post Sources of Energy Class 10 Notes Science Chapter 14 appeared first on Learn CBSE.

NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot

$
0
0

NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot are part of NCERT Solutions for Class 10 English Literature Reader. Here we have given NCERT Solutions for Class 10 English Literature Reader Chapter 4 A Shady Plotr.

NCERT Solutions for Class 10 English Literature Reader Chapter 4 A Shady Plot

TextBook Questions

Question 1.
Given below is a list of words related to ghosts and ghost stories with their jumbled up meanings against them. Match the words/expressions with their correct meanings :

A.Apparition(i) a feeling of anticipation of or anxiety over a future event
B.Poltergeist(ii) a reanimated corpse that is believed to rise from the grave at night to suck the blood of sleeping people
C.Clairvoyance(iii) a conjurer who expels evil spirits by conjuration
D.Crystal Ball(iv) a spelling-board device intended to communicate with and through the spirit world, obtaining answers to questions.
E.Eerie(v) beyond the range of normal experience or scientific explanation
F.Medium(vi) any of a set of 22 playing cards bearing allegorical representations, used for fortune telling
G.Transmigration(vii) a supernatural appearance of a person or thing, a ghost, spectre or phantom          –
H.Psychic(viii) so mysterious, strange, or unexpected as to send a chill up the spine
i.Ouija Board(ix) the supposed power to see objects or events that cannot be perceived by the senses
J.Exorcist(x) a person through whom the spirits of the dead are alleged to be able to contact the living
K.Premonition(xi) a globe of quartz crystal in which images, believed to portend the future, are supposedly visible to fortune tellers
L.Paranormal(xii) to pass into another body after death: going from one state of existence or place to another
M.Tarot Card(xiii) capable of extraordinary mental processes, such as extrasensory perception and mental telepathy
N.Vampire(xiv) German word, meaning ‘‘noisy ghost”-a troublesome spirit that announces its presence with unexplainable sounds and the creation of disorder

Answer:
A. (vii)
B. (xiv)
C. (ix)
D. (xi)
E. (viii)
F. (x )
G. (xii)
H. (xii)
I. (iv)
J. (iii)
K. (i)
L. (v)
M. (vi)
N. (ii)

Question 2.
The title of the story is A Shady Plot. The dictionary defines the words as: shady adjective
(а) Full of shade; shaded.
(b) Casting shade: a shady grove.
(c) Quiet, dark, or concealed; hidden.
(d) Of dubious character or of questionable honesty
Answer:
(c) Quiet, dark, or concealed; hidden.

plot noun
(a)

  • a small piece of ground, generally used for a specific purpose: a garden plot.
  • a measured area of land.

(b) a ground plan, as for a building; a diagram.
(c) storyline-the plan, scheme, or main story of a literary or dramatic work, as a play, novel, or short story.
(d) a secret plan to accomplish a hostile or illegal purpose; a scheme.

Based on the definitions above can you predict what the story will be about? Make a brief note of your prediction in your notebook.
Answer:
(c) storyline-the plan, scheme, or main story of a literary or dramatic work, as a play, novel, or short story.

Question 3.
Based on your reading of the story above, answer the following questions by ticking the correct options.
(a) The narrator earns his living by ……
(i) writing ghost stories
(ii) working as a reader for a magazine
(iii) working as a stenographer
(iv) working as an accountant in a lumber company
Answer:
(i) writing ghost stories

(b) The writer was overconfident about his ability to write ghost stories because ……
(i) whenever magazines wanted a ghost story, they got in touch with him
(ii) he was always able to write a ghost story whenever he had to write one
(iii) the readers appreciated his ghost stories
(iv) he knew the ghost lady would help him write a good ghost story
Answer:
(iii) the readers appreciated his ghost stories

(c) The sight of the ghost materialising in his room filled the narrator with ……
(i) fear
(ii) excitement
(iii) joy
(iv) anticipation
Answer:
(i) fear

(d) The ghost wanted John to
(i) stop his wife from using the Ouija board
(ii) stop using the Ouija board himself
(iii) stop his guests from using the Ouija board
(iv) stop people from using the Ouija board
Answer:
(iv) stop people from using the Ouija board

(e) John wants the ghost to disappear before his wife enters the room and waves his arms at the ghost with something of the motion of a beginner when learning to swim. His movement shows his ………
(i) fear
(ii) amusement
(iii) desperation
(iv) anxiety
Answer:
(iii) desperation

(f) When the narrator says his wife is never so pretty as when she’s doing something she knows he disapproves of, his tone is ……….
(i) amused
(ii) ironic
(iii) angry
(iv) irritated
Answer:
(iv) irritated

(g) The ghost says “It’s all your fault”. ‘It’ here refers to ………
(i) the narrator’s wife’s anger
(ii) the ghost’s anger
(iii) the narrator’s wife leaving him
(iv) the ghost materialising in sections
Answer:
(iii) the narrator’s wife leaving him

(h) Gladolia wishes to leave the narrator’s house as ……….
(i) she does not like the Ouija boards
(ii) she is afraid of the ghost
(iii) she is afraid of magic and hoodoo
(iv) she likes Ouija boards and hoodoo
Answer:
(iii) she is afraid of magic and hoodoo

Question 4.
Answer the following questions briefly :
(a) What genre of stories does Jenkins want the narrator to write? Why?
Answer:
Jenkins wants the narrator to write stories on the supernatural this time. He wants the narrator to do so because that is what the public wants. His stories are interesting and mysterious and his ghosts are propositions.

(b) Does the narrator like writing ghost stories? Support your answer with evidence from the story.
Answer:
The narrator likes writing ghosts stories because a ghost story has been his first fiction. It has changed the narrator with the idea. The idea comes to the narrator out of nowhere when Jenkins wants the narrator to write, the story comes by itself and the narrator is always be able to dig one story.

(c) What makes Helen, the ghost, and her other co-ghosts organize The Writer’s Inspiration Bureau?
Answer:
Helen and her other co-ghosts organise the Writers Inspiration Bureau for which they scout around until they find a writer without idea and with a mind soft enough to accept impression. The case is brought to the attention of the main office and one of them is assigned to it.

(d) Why had Helen, the ghost been helping the narrator write ghost stories? Why was she going on strike? What condition did she place for providing continued help?
Answer:
Helen the ghost had been helping the narrator to write ghost stories because he had always needed ideas and Helen gave them. She was now going on a strike because they were called too often and the people were using Ouija boards as the medium. Helen wanted John to get t all his friends to stop using the board then only would they start helping them.

(e) How does the ghost undermine the narrator’s faith in his ability to write ghost stories?
Answer:
The ghost thinks that the narrator can not write ghost stories but the ghosts give him the idea. Helen tells him that many a time it is she who has leant on his shoulder when he is thinking hard for an idea.

(f) Why does John want the ghost to disappear before his wife appears on the scene? What impression of his wife’s character do you form from his words?
Answer:
He asks the ghost to leave before his wife comes there, because he doesn’t want her to know his secret, moreover she would be afraid. These words show that his wife is suspicious and jealous.

(g) Why does the narrator hesitate to be a partner to Laura Hinkle during the Ouija Board Party?
Answer:
The narrator hesitates to be a partner to Laura Hinkle during the Ouija Board Party, because the ghost has asked him not to use it, then only she would help the narrator with ideas for ghost stories and Laura Hinkle is also very flirtatious.

(h) What message does the ghost convey to the group that had assembled in the narrator’s house? What is their reaction to the message?
Answer:
The ghost spelt T-R-A-I-T-O-R and then it said H-E-L-E-N. It wants to convey that someone had been trying to communicate with John through Mrs.Hunt’s and Mrs. Sprinkle’s Ouija. Everybody’s gaze turned towards the narrator and he came under the suspicion.

(i) Do you agree with the narrator calling the assembly of women “manipulators” ? Give reasons.
Answer:
The narrator rightly calls the assembly of women manipulators. Lavinia “manipulated” by buying Ouija board but says that it is for John’s research. Laura Hinkle manipulates John by trying to be flirtatious in order to learn working on the Ouija board.

(j) Why is John’s wife angry? What does she decide to do?
Answer:
John’s wife is angry because as John’s hand moves faster and faster on the board, his companion starts to spell out traitor and then it spells. Helen. Miss Hinkle asks Lavinia whether she knows anyone by the name of “Helen”. Miss Hinkle tells her that someone by the name of Helen has been trying to communicate with John. Lavinia gets angry at this and becomes suspicious of John. She decides to leave John and goes back to her grandmother.

(k) Why does John wish he were dead?
Answer:
From different parts of the room other manipulators begin to report. Each of those five Ouija boards is calling John’s name. Lavinia is looking at him through narrowed lids as though he is some peculiar insect. The murmur of conversation rises louder and louder. Miss Hinkle says that John looks sly, he goes straight upstairs and dozes off. In the morning there is no sign of his wife. He has hardly seated himself at the desk as he finds a white slip of paper saying that Lavinia is going back to her grandmother and her lawyer will communicate with John. John reading it cried “I wish I was dead” because he feels sad that his wife is leaving him.

(l) When confronted by Lavinia about his flirtations over the Ouija Board, John insists that ‘the affair was quite above-board, I assure you, my love’. Bring out the pun in John’s statement.
Answer:
Lavinia is getting suspicious4 of John with the Ouija board as his Angers seem to stick to that dreadful board. It spells Helen that makes Lavinia suspicious. She says they do not know anyone by the name of Helen. She thinks there is somebody hiding there. Lavinia tells John there is not a bit use trying to deceive her, he is trying to conceal something. It is bad enough to have him flirt over Ouija board with that hussy to which John replies that the affair is quite above board which means that John has nothing to do with Miss Hinkle.

(m) John’s apprehensions about his wife’s reaction to her encounter with the ghost are unfounded. Justify.
Answer:
John thinks if Lavinia sees the ghost, she would react sharply but she doesn’t. A broad satisfied smile spreads over her face “I thought you were Helen of Troy, she murmurs”. The ghost said, “I use to be Helen of Troy, New York and now I’ll be moving along.” Lavinia falls at this.

Question 5.
Answer the following questions in detail :
(a) After her reconciliation with her husband, John Hallock, Lavinia writes a letter to her friend expressing how her relationship with him had almost been on the verge of breaking and what saved it. Write her letter.
Answer:
Dear friend,

I had bought Ouija board and arranged for an Ouija Board Party. My friends sat in couples with a board. There was a squeak of legs heard all around. I paired John with Laura Hinkle who had a flirtatious way. She tried to move her hand over the board and soon it spelt Helen. Then all the five boards echoed the same name. I got annoyed at this and suspected John for I did not know anyone by this name. I planned to leave him and go back to my grandmother. Our marriage was about to break but Helen’s ghost appeared before me and John that made me know the truth. It was all due to the Ouija board. It saved my break with John.

Yours Lavinia

(b) John Hallock reflects upon his experience with Helen’s ghost and in retrospect he finds it quite amusing. All the same he is relieved that he is no longer plagued by it. r Ironically, the self same ghost inspires his creativity and he writes a diary entry reflecting upon the comical aspect of his experience. Write his diary entry.
Answer:
Tuesday 15th may, –
20XX, 10.30 p.m.
Dear Diary
I was thinking of writing a ghost story when suddenly I saw an apparition taking shape in front of me. It named itself as Helen. The ghost told me that these ghosts helped people like us with ideas to write their stories. I imagined it to be something very funny that the ghost and his co-mates were coming up. But it suddenly appeared before me and Lavinia and it had also appeared by the Ouija boards surprising all the women. But the most interesting part that I realised was that the same ghosts inspired my creativity to write a ghost story.

Question 6.
The narrator and his wife reveal something about their character in their words and actions. We also learn about them from what other people say. Can you pick out the words that describe them from the box given below? Also, pick out lines and Instances
NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot 3
NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot 4
NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot 5
Answer:

John Hallock4. I sat down to write a ghost story.4. creative
5. His magazine was only one to print my stuff.5. protective
Lavinia Hallock1. Such as my wife’s shopping1. loves novelty and thrills
2. Cure her of her tendency to take everv new fad2. spendthrift
3. John, whv are vou sitting in the dark?3. suspicious
4. Looking as if I were some peculiar insect4. Jealous

Question 7.
Gladolia, the narrator’s cook, is an African. The language she speaks is different from that of the others. This is known as Dialect. A diqlect consists of words or phrases that reflect the regional variety of a language. An author often uses a regional dialect to make the dialogue more authentic. Initially a dialogue may seem a little difficult to understand. However, as you continue reading, the language will become more comprehensible Working in groups, write what Gladolia’s words mean as shown.

COLUMN ACOLUMN B
A. Misto Hallock(i) Mister Hallock
B. de Missus(ii) ………………………………………..
C. sho t’inks you’s lost!(ii) ………………………………………..
D. she done ‘phone you dis mawnin’(iv)…………………………………….
E. fo’ de lawd’s sake(v)……………………………………….
F. not to stop to argify now(vi)………………………………………
G. I’s gwine t’ quit.(vii)……………………………………..
H. i don’t like no hoodoos.(viii)…………………………………….
i. I’se done let’ dis piace(ix) ……………………………………
J. i is(x)………………………………………

Answer:

COLUMN ACOLUMN R
A. Misto Hallock(i) Mister Hallock
B. de Missus(ii) The Mrs.
C. sho t’inks you’s lost!(iii) She thinks vou are lost.
D. she done ‘phone you dis mawnin’(iv) She did not phone vou this morning
E. fo’ de lawd’s sake(v) For the Lord’s sake
E not to stop to argify now(vi) Stop to argue
G. Is gwine t’ quit.(vii) I am also going to quit
H. I don’t like no hoodoos.(viii) I don’t like
I. I’se done leP dis place(ix) I will leave this place
J. I is(x) I am

Question 9.
Read and understand the following ghost phrases and expressions :
(a) To give up the ghost — to die or to stop trying
(b) A ghost of a chance — a poor chance, not likely to happen
(c) The ghost at the feast — something or someone that spoils your enjoyment by reminding you of something unpleasant
(d) Ghost town — a town where most people have left-abandoned and deserted
(e) Ghost-write — to write for someone else
(f) Lay the ghost of something/somebody (to rest) — to finally stop being worried or upset by something or someone that has worried or upset you for a long time
(g) Ghost image — secondary image, esp. one appearing on a television screen as a white shadow, caused by poor or double reception or by a defect in the receiver
(h) the ghost of a smile — faint trace of a smile
(i) As white as a ghost — very pale or white in the face

Now complete the following story by using the appropriate phrases in the blanks given below :

I was alone in a place that bore a deserted look like that of a (a) _____ I increased the pace of my footsteps as I walked through the dark forest. I felt someone walking behind me. I turned immediately and spotted the contour of a figure in the form of a (b) _____ It smiled at me wickedly. I started shaking with fear and perspiring profusely when I felt its skeletal hand upon my neck. I woke up with a start, relieved that it was only a nightmare.

This was not the first time I had had one. It had all started when I had watched the horrendous horror film with an eerie ghost character that had a scary ghost of a smile on its face. It had been almost a month. The strange thing was that I saw a similar face at the station the next morning. That was uncanny.

I was to attend a dinner at my friend’s at Northanger Abbey that night. I had decided to narrate my experience to the group that would assemble there although I knew there was (c) _____ that they would be convinced.

After everyone had finished pouring their drinks to themselves, I cleared my throat and started narrating my spooky experience. However, every one of the group started accusing me of being (d) _____ and held me responsible for spoiling the spirit of revelry. I gave up the ghost and sat quietly waiting for the party to be over. Back at home, the fears returned. I knew I had to talk about my experience to somebody to feel better. I have now decided to (e) _____ and publish my experience under a pseudonym. Only then can I (f) _____

Answer:
(a) ghost town
(b) ghost image
(c) a ghost of a chance
(d) the ghost at the feast
(e) ghost-write
(f) lay the ghost of something

Speaking

Question 10.
Ghosts and haunting have fascinated the public for centuries. Although many doubt the existence of ghosts or other paranormal entities, many people dedicate their lives to searching and recording paranormal activity. Ghost tours, support groups, and research societies, to name just a few, permeate our society and seek to answer questions about paranormal activity.

Interview your friends, relatives and people in your neighbourhood about whether they believe in the existence of ghosts. Ask them to tell you of any specific experiences they might have had in this context. In your groups identify the most fascinating anecdote you gathered on the basis of your interactions. Narrate it to the class.
Answer:
Ghosts, paranormal entities all these sound spooky and give me goosebumps. I interviewed some of imy friends and came to know about their most eerie experiences. However, some of the stories were really scary and I want to share one such story with you. It so happened that one of the my friends was visiting his grandparents’ place by train. It was night-time and there was no one in the compartment except my friend. He took out his sleeping bag and making himself comfortable started reading a book. While reading, he fell asleep. He woke up suddenly on hearing a knock at the door of his compartment that was bolted from inside, the train had halted at a platform. He got down from his berth and opened the door. But there was nobody outside. After bolting the door, he turned and again came a knock, this time louder than before. Suddenly, he recoiled in horror as he saw a small, white icy cold hand coming out of the closed door of the compartment. A strange scraping sound could also be hared that frightened him out of his wits. He shrieked loudly and was about to faint when the train began to move and he came back to his senses. When the T.T. arrived he shared this strange experience with him and was shocked to hear that many people had claimed to have seen the hand. For the rest of the journey, my friend just sat and prayed to God and felt relieved only when he reached his grandparents’ home safely. I also shuddered to hear his account.

Writing

Question 11.
Do you think a story has an atmosphere ? Complete the following blanks to make up your ghost story by choosing the correct options.

A Ghost Story

She opened the (a)…………………………. (secret door/ spaceship’s hatch/door of the cottage/ cemetery gate/ door of the castle/ cockpit) (b)…………………………………. (brashly/ loudly/ silently/ stupidly/ fearfully/ joyously). Standing in front of her was a (c)………………….. (terrifying/ handsome/smelly/ anonymous tiny/ huge/ bossy) …………………. (policeman/ spy/ apparition/ witch/ prince/ wizard) with a …………………. (wand/ rose/rod/ knife/ scythe/coded message) in his/ her (its) …………………. (ghoulish/ bony/ beautiful/ fair/ manly/gloved/ magical) hand.
Answer:
(a) cemetery gate
(b) fearfully
(c) terrifying
(d) apparition
(e) scythe
(f) bony

Now that you have shared a ghost story / anecdote as well as completed a guided story in the class, create your own Ghost story on the basis of the starters given below:
(a) Stephen knew he would never sleep. The noises, those horrid sounds, would keep him awake…
Answer:
Stephen had to shift to a villa btplt in a lonely part of the countryside with his parents. His father worked as a forest ranger in one of the parts of India. There were stories about the place that an apparition haunted the area. The people of the village also believed in this witchcraft. The atmosphere, Stephen found around the place, was uncanny and mysterious. His parents did not believe in all these things. In the evenings they used to hear horrifying sounds and cries from the village. They were told that it was the witch doctor who performed all sorts of things to keep away evil spirits at night.

One night it was cold and wet. The weather seemed to be unpleasant and Stephen found it difficult to sleep. Suddenly in the middle of the night he “woke up by a scratching sound on his windowpane. He looked through the darkness and saw something with a strange shape trying • to open the window, not able to visualise properly he groped for the torch and rushed to his parents room. But they could not find anything. Only the shrill cries of the witch doctor could be heard. Stephen became seriously ill. His father had to shift to the city. But the mystery was still there. People said that on a full moonlit night the village was haunted by a strange figure

(b) Tap, tap, tap. Was it the branches of the nearby tree, or fingernails against the window ?
Answer:
Self attempt

(c) People often say, ‘There’s no such thing as ghosts…
Answer:
Self attempt

You are familiar with the key elements of a short story viz setting, plot, conflict, character and point of view. Given below are specifics to be kept in mind while writing a Ghost story. Also make use of the vocabulary that you have learnt from the story A Shady Plot.

  • Colours, sounds, feeling words
  • Strong definite characters
  • Creating suspense
  • Setting the scene and the atmosphere
  • Describing the weather
  • Clear opening line
  • Personal feelings
  • Clear ending
  • Describing the sounds
  • Adding a dramatic element
  • Mystery

NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot 9

Answer:
Self attempt

Speaking

Question 12.
While conventional Ghost stories are scary and gruesome, several modern versions are humorous. The Canterville Ghost, by Oscar Wilde, is one of the best ghost stories written in the vein of laughing satire. The story that you just read is another example in case. Humour arises out of the narrator’s ability to laugh at himself, clever use of language as well as comic situations. Discuss within your groups what makes the Shady Plot humorous. Share your views during a whole class discussion.
Answer:
People often say, ‘There’s no such thing as ghosts.’ But ask me and I’ll tell you one such spine- chilling account that will force you to believe in the paranormal visions. My best friend told me this grotesque tale of an old man who could be seen laughing and dancing on full-moon nights in his village. Once he was alone at home as his parents had gone to attend the wedding of a distant relative. It was the month of July and the rain was coming down in sheets. The dogs were howling outside in the streets. He felt shivers of fear down his spine and gathering courage, came out of his room to check if all the doors bolted properly. He heard somebody whispering outside the window and as he peeped out of the misty pane, he saw a spectre laughing wickedly. The sound was shrill and weird and in the darkness, he witnessed the abnormal looking old man dancing weirdly. The wind was howling loudly adding to the atmosphere, an eerie feeling. He let out a loud scream and ran back to his room. Just then, he heard a knock at the door. He crept in the corner but the knocks just didn’t stop. He gathered courage and slowly moved towards the main door. His fears vanished when he heard his parents calling his name. They were relieved to see him safe and assured him that there was nobody outside.

Generally, ghost stories have a kind of spookiness around them. The whole atmosphere is eerie and the ghosts are supposed to frighten people. But ‘The Shady Plot’ is illustrated differently. The setting is the house of the author. The ghosts were similar to human beings. When the author saw something strange taking shape, he was not at all scared rather seemed to doubt his senses into believing that she was a ghost not a real girl. To add to the humour the girl talked about going on strike with other ghosts with whom she had organized ‘The Writer’s Inspiration Bureau. Unlike ghosts she seemed too pathetic when she requested the author to ask his friends and acquaintances stop using the Ouija board. Even funniest was the incident when his wife suspected him of having an iffair with a ghost ‘Helqp’.

Question 13.
Listen to the extract from The Canterville Ghost by Oscar Wilde and complete the following tasks as directed.
Answer the following questions :

(a) The Ghost loved the stormy weather because ….. (Complete the statement by ticking the correct option)
(i) he liked the rain
(ii) he liked the strong wind that shook and rattled all the windows and doors in the old house
(iii) his plan would fail otherwise
(iv) such weather was ideal for frightening the people in the house.

(b) The Ghost was particularly angry with Washington and wished to frighten him because ….. (Complete the statement)

(c) The Ghost did not wish to frighten Virginia because ….. (Complete the statement)

(d) The Ghost was most angry with ….. (Complete the statement by ticking the correct option)
(i) Mr and Mrs Otis
(ii) Virginia
(iii) Washington
(iv) The Twins

(e) Write two striking qualities of the Ghost as are revealed in this extract.
(i) ………………………….
Answer:
(a) (iv)such weather was ideal for frightening the people in the house

(b) (i) It was Washington who kept on removing the famous canterville blood stain by using his pinkerten Paragon detergent.
(ii)She has never insulted him and was pretty and gentle.

(c) (iv) The Twins

(d) (i)Scheming : He carefully planned to avenge.
(ii)Determined: He was determined to teach the kids a lesson.

We hope the NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot help you. If you have any query regarding NCERT Solutions for Class 10 English Literature Reader Chapter 4 A Shady Plot, drop a comment below and we will get back to you at the earliest.

The post NCERT Solutions for Class 10 English Literature Chapter 4 A Shady Plot appeared first on Learn CBSE.

Viewing all 10026 articles
Browse latest View live


<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>