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

If force and displacement are in opposite direction, the work done is taken as

Question # 2

The unit of work in CGS system is

Question # 3

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

Question # 4

The value of escape velocity of Earth planet comes out to be:

Question # 5

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

Question # 6

1 J = ________?

Question # 7

The space around the earth within which it expects a force of attraction on other bodies is known as:

Question # 8

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 # 9

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

Question # 10

When force and displacement are perpendicular to each other than work is equal to

Question # 11

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

Question # 12

Which force is not a conservative force:

Question # 13

The angle between centripetal force and displacement of the body moving in a circle is:

Question # 14

A solar cell converts energy of the Sun into:

Question # 15

Work has a dimension as that of:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A or B is correct
D. Both A and B is correct
2 The work performed on an object does not depend on:
A. Force applied
B. Angle at which force is inclined to the displacement
C. Initial velocity of the object
D. Displacement
3 A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:
A. Minimum Work
B. Maximum Work
C. Zero Work
D. Negative Work
4 The energy stored int he water of the dam is:
A. Electric energy
B. Kinetic energy
C. Potential energy
D. None of these
5 The total work done in moving the body up and then down through the same height in a gravitational field is equal to:
A. mgh
B. Its wight
C. Weight X height
D. Zero
6 Area under the force displacement graph gives
A. Power
B. Work
C. Heat
D. Energy
7 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
8 Which of the following types of force can do no work on the particle on which it acts
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
9 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
10 Which one is conservative force
A. Electric force
B. Frictional force
C. Normal force
D. Air resistance

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