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

00:00
Question # 1

Watt x second is unit of:

Question # 2

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

Question # 3

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

Question # 4

The types of mechanical energy is/are:

Question # 5

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

Question # 6

The power of an electric generating station is expressed in:

Question # 7

The work performed on an object does not depend on:

Question # 8

Work is a:

Question # 9

Work is always done on a body when:

Question # 10

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

Question # 11

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

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 is 25J. The angle which the force makes the direction of motion will be:

Question # 13

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

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 with the direction of motion will be:

Question # 15

Which force is not a conservative force?

Question # 16

The dimensions of work

Question # 17

The angle between centripetal force and displacement of the body moving in a circle is:

Question # 18

Work has a dimension as that of:

Question # 19

The work performed on an object does not depend on

Question # 20

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 21

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 22

Work is a

Question # 23

SI Unit of work is

Question # 24

Work is a:

Question # 25

Work is a scalar product of

Question # 26

The work done on the body will be zero if:

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

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Sr. # Question Answer
1 Work done is lowering the bucket into the well is:

A. Zero

B. Positive

C.Negative

D. None of these

2 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:

A. 0°

B. 30°

C.60°

D. 90°

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

A. 0°

B. 90°

C.180°

D. None of these

4 A solar cell is made from:

A. Iron

B. Silicon

C.Germanium

D. Copper

5 Watt x second is unit of:

A. Force

B. Work

C.Power

D. None of these

6 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

7 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

8 A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

A. Minimum work

B.

Maximum work

C.Zero work

D. Negative work

9 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

10 Which one is conservative force

A. Electric force

B. Frictional force

C.Normal force

D. Air resistance

11 Work is always done on a body when:

A. A force acts on it

B. It moves through certain distance

C.None of A and B is correct

D. Both A and B is correct

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

A. Electric Field

B. Gravitational field

C.Magnetic field

D. Conservative field

13 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

14 Work is a

A. Scalar quantity

B. Vector quantity

C.Base quantity

D. None of these

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

A. Maximum

B. Minimum

C.Zero

D. Unity

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

A. Potential

B. Chemical

C.Mechanical

D. sound and heat

17 Which of the following type 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

18 Maximum work is done when force and displacement are

A. Parallel

B. Antiparallel

C.Perpendicular

D. Both a and b

19 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

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

A. Unity

B. Infinity

C.Zero

D. -Fd

21 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

22 Work done is independent of path followed in _______

A. Gravitational field

B. Magnetic field

C.Electric field

D. All of these

23 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

24 Most of the geysers occur in:

A. Volcanic regions

B. Magnetic regions

C.Northern region

D. None of these

25 Energy stored in the spring of a watch is called

A. Potential energy

B. Kinetic energy

C.Nuclear energy

D. Elastic potential

26 When velocity of moving body is doubled, the quantity which is also doubled is its:

A. K.E.

B. Acceleration

C.Momentum

D. P.E.

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 in 25J. The angle which the force makes with the direction of motion will be

A. 60°

B. 90°

C.30°

D. 0°

28 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

29 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

30 Work has a dimension as that of:

A. Torque

B. Angular momentum

C.Linear momentum

D. Power

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