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

Work is a scalar product of

Question # 2

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:

Question # 3

The work performed on an object does not depend on:

Question # 4

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

Question # 5

Work is a:

Question # 6

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

Question # 7

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 # 8

Work done along a closed path in a gravitational field is:

Question # 9

The work performed on an object does not depend on:

Question # 10

The work done by a force, keeping an object in circular motion with constant speed is:

Question # 11

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

Question # 12

The tidal energy is due to gravitational pull of :

Question # 13

Which of the following is not a unit of power:

Question # 14

If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:

Question # 15

The power of an electric generating station is expressed in:

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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 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:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
4 The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is
A. Much more
B. Very small
C. No amount at all
D. None of these
5 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
6 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
7 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
8 The work done in moving a body between two points in a conservation field is independent of the:
A. Direction
B. Force applied
C. Path followed by the body
D. Power
9 The field in which work done in moving a body between two points depends upon the path followed is called:
A. Conservative field
B. Non-conservative field
C. Electric field
D. None of these
10 Escape velocity from surface of Moon as compared to that from Earth surface is:
A. Greater
B. Smaller
C. Equal
D. None of thes

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