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

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

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

Work done by the force of friction is always

Question # 4

Work is product of:

Question # 5

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Question # 6

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

Question # 7

The unit of work in CGS system is

Question # 8

The energy stored int he water of the dam is:

Question # 9

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

Question # 10

SI Unit of work is

Question # 11

Energy stored in the spring of a watch is called

Question # 12

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

Question # 13

The work done in moving a body between two points in a conservation field is independent of the:

Question # 14

The power of an electric generating station is expressed in:

Question # 15

Work is a scalar product of

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The work done by a force, keeping an object in circular motion with constant speed is:
A. Zero J
B. 1 J
C. 0.1 J
D. 0.01 J
2 When a body moves against the force of friction on a horizontal plane, the work done by the body is:
A. Positive
B. Negative
C. Zero
D. None of these
3 When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:
A. 2 J
B. 0.25 J
C. 1 J
D. 0.5 J
4 1 J = ________?
A. 107erges
B. 10-7erges
C. 105erges
D. 10-5erges
5 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
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 with the direction of motion will be:
A. 60°
B. 90°
C. 30°
D. 0°
7 The work done on the body will be zero if:
A. No force is applied on the body
B. Force is applied but no displacement
C. Angle between F(force) and d(displacement) is 90°
D. All of these are correct
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 A two Kg block is held 1 m above the floor for 50 seconds, the work done is:
A. Zero
B. 10.2 J
C. 100 J
D. 980 J
10 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

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