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

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

Question # 2

A solar cell is made from:

Question # 3

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

Question # 4

The tidal energy is due to gravitational pull of :

Question # 5

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

Question # 6

Which of the following is not a unit of power:

Question # 7

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:

Question # 8

The work performed on an object does not depend on

Question # 9

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

Question # 10

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

Question # 11

Work is a:

Question # 12

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 # 13

Area under the force displacement graph gives

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
2 The space around the earth within which it expects a force of attraction on other bodies is known as:
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
3 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
4 A 2 kg block is held 1 m above floor for 50 seconds. The work done is:
A. Zero
B. 10.2 J
C. 100 J
D. 980 J
5 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
6 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
7 When a wall is pushed by a person very strongly, he has done:
A. Maximum work
B. Zero work
C. Positive work
D. Negative work
8 Tick the conservation force:
A. Tension in a string
B. Air resistance force
C. Elastic spring
D. Frictional force
9 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
10 In the force applied to parallel to the direction of motion, then the work done is:
A. Positive
B. Negative
C. Zero
D. None of these

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