ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

The tidal energy is due to gravitational pull of :

sun A
moon B
Mars C
None of these D

Question # 2

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

Direction A
Force applied B
Path followed by the body C
Power D

Question # 3

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 4

Energy stored in the spring of a watch is called

Potential energy A
Kinetic energy B
Nuclear energy C
Elastic potential D

Question # 5

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 # 6

Which one is conservative force

Electric force A
Frictional force B
Normal force C
Air resistance D

Question # 7

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

mgh A
Its wight B
Weight X height C
Zero D

Question # 8

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

Frictional force A
Gravitational force B
Electric force C
Centripetal force D

Question # 9

A solar cell converts energy of the Sun into:

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

Question # 10

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:

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

Question # 11

1 J = ________?

10⁷erges A
10^-7erges B
10⁵erges C
10^-5erges D

Question # 12

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 # 13

SI Unit of work is

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

Question # 14

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 # 15

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 16

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

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

Question # 17

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

Direction A
Force applied B
Path followed by the body C
Power D

Question # 18

Tick the conservative force

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

Question # 19

The commercial unit of electrical energy is :

K Watt A
KWH B
Horse power C
Joule D

Question # 20

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

Frictional force A
Gravitational force B
Electric force C
Centripetal force D

Question # 21

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:

0° A
30° B
60° C
90° D

Question # 22

Work is a:

Scalar quantity A
Vector quantity B
Base quantity C
None of these D

Question # 23

Work is a Quantity

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

Question # 24

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

2 watt-hour A
120 watt-hour B
30 watt-hour C
None of these D

Question # 25

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

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

Question # 26

The types of mechanical energy is/are:

Kinetic energy A
Potential energy B
Both of these 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

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	Work done is maximum when angle between force and displacement is:	A. 0° B. 90° C. 180° D. None of these
2	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
3	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
4	The total work done in moving the body up and then down through the same height in a gravitational field is equal to:	A. mgh B. Its wight C. Weight X height D. Zero
5	Work done along a closed path in a gravitational field is:	A. Maximum B. Minimum C. Zero D. Unity
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	Work done is maximum when angle between force and displacement is	A. 0° B. 90° C. 180° D. None of these
8	Work is a:	A. Scalar quantity B. Vector quantity C. Base quantity D. None of these
9	Escape velocity from surface of Moon as compared to that from Earth surface is:	A. Greater B. Smaller C. Equal D. None of thes
10	Work done is independent of path followed in _______	A. Gravitational field B. Magnetic field C. Electric field D. All of these

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