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 field in which the work done is moving a body along closed path is zero is called:

Question # 2

In the force applied is parallel to the direction of motion, then work done is:

Question # 3

In the force applied to parallel to the direction of motion, then the work done is:

Question # 4

Which of the following type of force can do no work on the particle on which it acts:

Question # 5

Work is always done on a body when:

Question # 6

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

Question # 7

A solar cell is made from:

Question # 8

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 9

The ultimate source of money sources of energy is:

Question # 10

Which one is conservative force

Question # 11

The tidal energy is produced due to rotation of Earth relative to:

Question # 12

The unit of work in CGS system is

Question # 13

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

Question # 14

SI Unit of work is

Question # 15

Which of the following is not a unit of power:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these
2 The tidal energy is due to gravitational pull of :
A. sun
B. moon
C. Mars
D. None of these
3 The work done in moving a body between two points in a conservative field is independent of the
A. Direction
B. Force applied
C. Path followed by the body
D. Power
4 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
5 Work has the dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
6 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:
A. 60°
B. 90°
C. 30°
D. 0°
7 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:`
A. Minimum work
B.
Maximum work
C. Zero work
D. Negative work
8 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
9 Escape velocity from surface of Moon as compared to that from Earth surface is:
A. Greater
B. Smaller
C. Equal
D. None of thes
10 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:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these

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