ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 4 Work and Energy

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ECAT Physics Chapter 4 Work and Energy

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Question # 1

A solar cell is made from:

Question # 2

Work is a always done on a body when

Question # 3

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:

Question # 4

Escape velocity from surface of Moon as compared to that from Earth surface is:

Question # 5

The types of mechanical energy is/are:

Question # 6

The commercial unit of electrical energy is :

Question # 7

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 8

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. The angle which the force makes the direction of motion will be:

Question # 9

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

Question # 10

1 J = ________?

Question # 11

A solar cell converts energy of the Sun into:

Question # 12

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 13

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

Question # 14

The unit of work in CGS system is

Question # 15

When a falling body hits ground, its KE changes to _____ energy.

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
2 A field in which the work done in moving a body along closed path is zero is called
A. Nuclear Field
B. Conservative field
C. Gravitational field
D. Non-conservative field
3 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
4 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
5 A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J
6 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
7 Watt x second is unit of:
A. Force
B. Work
C. Power
D. None of these
8 If force and displacement are in opposite direction, the work done is taken as
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
9 Which one is conservative force
A. Electric force
B. Frictional force
C. Normal force
D. Air resistance
10 In the force applied to parallel to the direction of motion, then the work done is:
A. Positive
B. Negative
C. Zero
D. None of these

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