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

SI Unit of work is

Question # 2

Work done is maximum when angle between force and displacement is:

Question # 3

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

Question # 4

Work has the dimensions as that of

Question # 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:

Question # 6

Which force is not a conservative force:

Question # 7

The commercial unit of electrical energy is :

Question # 8

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

Question # 9

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

Question # 10

Work is a:

Question # 11

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

Question # 12

Work is a:

Question # 13

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 # 14

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 15

The ultimate source of money sources of energy is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work done is maximum when angle between force and displacement is
A. 0°
B. 90°
C. 180°
D. None of these
2 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these
3 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
4 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
5 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
6 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
7 When velocity of moving body is doubled, the quantity which is also doubled is its:
A. K.E.
B. Acceleration
C. Momentum
D. P.E.
8 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
9 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
10 Work is a Quantity
A. Vector
B. Scalar
C. Non-physical
D. None of these

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