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

Teh consumption of energy by a 1000 watt heater in half an hour is:

Question # 2

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

Question # 3

Which force is not a conservative force?

Question # 4

Work is always done on a body when:

Question # 5

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

Question # 6

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

Question # 7

When a wall is pushed by a person very strongly, he has done:

Question # 8

Watt x second is unit of:

Question # 9

Work is a always done on a body when

Question # 10

When two protons are brought are brought closer potential energy of both of them:

Question # 11

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 # 12

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

Question # 13

The work performed on an object does not depend on:

Question # 14

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

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 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
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 If one newton force acts on a body and displaces the body through 1m work done on body is
A. 1 dyne
B. 1 joule
C. 1KJ
D. 1 Watt
4 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
5 Most of the geysers occur in:
A. Volcanic regions
B. Magnetic regions
C. Northern region
D. None of these
6 Tick the conservation force:
A. Tension in a string
B. Air resistance force
C. Elastic spring
D. Frictional force
7 The Space around the Earth within which it exerts a force of attraction on other bodies is known as
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
8 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
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 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

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