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

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:

Question # 2

In the force applied to parallel to the direction of motion, then the work done is:

Question # 3

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

Question # 4

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

Question # 5

Work is a always done on a body when

Question # 6

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

Question # 7

The tidal energy is due to gravitational pull of :

Question # 8

A solar cell is made from:

Question # 9

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

Question # 10

Work is always done on a body when:

Question # 11

The work performed on an object does not depend on:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The space around the earth within it exerts a force of attraction on other bodies of known as:

Question # 16

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 17

Work has a dimension as that of:

Question # 18

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

Question # 19

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

Question # 20

Work-energy principle states that work done on the body by applied force is equal to change in:

Question # 21

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Question # 22

Maximum work is done when force and displacement are

Question # 23

Which force is not a conservative force?

Question # 24

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

Question # 25

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 # 26

Most of the geysers occur in:

Question # 27

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 # 28

Which of the following is not a unit of power:

Question # 29

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

Question # 30

Work has the dimension as that of:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work is a always done on a body when
A. A force acts on it
B. It moves through certain distance
C. None of A or B is correct
D. Both A and B are correct
2 Work-energy principle states that work done on the body by applied force is equal to change in:
A. Potential energy
B. Kinetic nergy
C. Linear momentum
D. None of these
3 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
4 The work done in moving a body between two points in a conservation field is independent of the:
A. Direction
B. Force applied
C. Path followed by the body
D. Power
5 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
6 Teh consumption of energy by a 1000 watt heater in half an hour is:
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh
7 A field in which the work done in moving a body along closed path is zero is called
A. Nuclear Field
B. Conservative field
C. Gravitational field
D. Non-conservative field
8 Which of the following is not a unit of power:
A. J-sec
B. Watt
C. N m/sec
D. Horsepower
9 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
10 Work has a dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power

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