ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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:`

Minimum work A
Maximum work
B
Zero work C
Negative work D

Question # 2

SI Unit of work is

Nm^-1 A
Joule B
Nms C
Both a and b D

Question # 3

If one newton force acts on a body and displaces the body through 1m work done on body is

1 dyne A
1 joule B
1KJ C
1 Watt D

Question # 4

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:

1.25 J A
12.5 J B
125 J C
None of these D

Question # 5

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

Zero A
10.2 J B
100 J C
980 J D

Question # 6

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

Zero J. A
0.1 J B
1 J C
0.01 J D

Question # 7

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

0° A
90° B
180° C
None of these D

Question # 8

Tick the conservation force:

Tension in a string A
Air resistance force B
Elastic spring C
Frictional force D

Question # 9

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

Potential A
Chemical B
Mechanical C
sound and heat D

Question # 10

The work performed on an object does not depend on:

Force applied A
Angle at which force is inclined to the displacement B
Initial velocity of the object C
Displacement D

Question # 11

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

0° A
90° B
180° C
None of these D

Question # 12

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

Nuclear Field A
Conservative field B
Gravitational field C
Non-conservative field D

Question # 13

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

Electric Field A
Gravitational field B
Magnetic field C
Conservative field D

Question # 14

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Minimum Work A
Maximum Work B
Zero Work C
Negative Work D

Question # 15

The power of an electric generating station is expressed in:

Kilo Jule A
Kilowatt-hour B
Kilo watt C
Watt D

Question # 16

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

Maximum A
Minimum B
Zero C
None of these D

Question # 17

The work done on the body will be zero if:

No force is applied on the body A
Force is applied but no displacement B
Angle between F(force) and d(displacement) is 90° C
All of these are correct D

Question # 18

The energy stored int he water of the dam is:

Electric energy A
Kinetic energy B
Potential energy C
None of these D

Question # 19

A solar cell converts energy of the Sun into:

Heat energy A
Magnetic energy B
Light energy C
Sound energy D

Question # 20

Work has the dimensions as that of

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 21

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

Much more A
Very small B
No amount at all C
None of these D

Question # 22

The unit of work in CGS system is

Joule A
Erg B
Dyne C
Watt D

Question # 23

Work is a Quantity

Vector A
Scalar B
Non-physical C
None of these D

Question # 24

The commercial unit of electrical energy is :

K Watt A
KWH B
Horse power C
Joule D

Question # 25

Area under the force displacement graph gives

Power A
Work B
Heat C
Energy D

Question # 26

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 27

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

0.5 Kwn A
2 Kwh B
1 Kwh C
None of these D

Question # 28

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:

60° A
90° B
30° C
0° D

Question # 29

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

Increases A
Decreases B
Remains same C
None of these D

Question # 30

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

Maximum A
Minimum B
Zero C
Negative D

Sr.#	Question	Answer
1	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
2	A field in which the work done is moving a body along closed path is zero is called:	A. Nuclear filed B. Conservative field C. Gravitational field D. Non-conservative field
3	SI Unit of work is	A. Nm^-1 B. Joule C. Nms D. Both a and b
4	Work done is maximum when angle between force and displacement is	A. 0° B. 90° C. 180° D. None of these
5	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. 0.5 J B. 2 J C. 0.25 J D. 1 J
6	A laborer carrying a load on his head moves from the 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
7	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:	A. +5 X 10¹J B. +5 X 10²J C. +5 X 10³J D. +5 X 10⁴J
8	Work done by the force of friction is always	A. Positive B. Zero C. Negative D. Maximum
9	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
10	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

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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

ECAT Pre General Science Physics Chapter 4 Work and Energy

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:`

SI Unit of work is

If one newton force acts on a body and displaces the body through 1m work done on body is

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:

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

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

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

Tick the conservation force:

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

The work performed on an object does not depend on:

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

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

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

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

The power of an electric generating station is expressed in:

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

The work done on the body will be zero if:

The energy stored int he water of the dam is:

A solar cell converts energy of the Sun into:

Work has the dimensions as that of

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

The unit of work in CGS system is

Work is a Quantity

The commercial unit of electrical energy is :

Area under the force displacement graph gives

Work done is lowering the bucket into the well is:

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

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:

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

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

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