ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 4 Work and Energy

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ECAT Pre General Science Physics Chapter 4 Work and Energy

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Question # 1

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 2

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 # 3

Work has the dimension as that of:

Question # 4

Work is always done on a body when:

Question # 5

A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:

Question # 6

The field in which work done in moving a body between two points depends upon the path followed is called:

Question # 7

The unit of work in CGS system is

Question # 8

The ultimate source of money sources of energy is:

Question # 9

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

Question # 10

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

Question # 11

Work is a scalar product of

Question # 12

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 # 13

Which of the following is not a unit of power:

Question # 14

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 # 15

Work is product of:

Question # 16

Tick the conservation force:

Question # 17

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 # 18

Work done on a body by gravity in lifting it up to certain height is

Question # 19

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

Question # 20

Work is a:

Question # 21

The space around the earth in which its gravitational force acts on a body is called

Question # 22

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

Question # 23

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 # 24

Work has a dimension as that of:

Question # 25

The commercial unit of electrical energy is :

Question # 26

Work done is lowering the bucket into the well is:

Question # 27

Power is a :

Question # 28

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

Question # 29

Which force is not a conservative force:

Question # 30

Which one is conservative force

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
3 The angle between centripetal force and displacement of the body moving in a circle is:
A. 0°
B. 90°
C. 180°
D. None of these
4 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
5 Work done in lower and bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
6 A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J
7 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
8 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
9 If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:
A. Power
B. Work
C. Pressure
D. None of these
10 In the force applied is parallel to the direction of motion, then work done is:
A. Maximum
B. Minimum
C. Zero
D. None of these

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