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

Work is always done on a body when:

A force acts on it A
It moves through certain distance B
None of A and B is correct C
Both A and B is correct D

Question # 3

Work is a always done on a body when

A force acts on it A
It moves through certain distance B
None of A or B is correct C
Both A and B are correct D

Question # 4

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 5

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

Positive A
Negative B
Zero C
None of these D

Question # 6

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

Positive A
Negative B
Zero C
None of these D

Question # 7

The energy stored int he water of the dam is:

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

Question # 8

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

Potential energy A
Kinetic nergy B
Linear momentum C
None of these D

Question # 9

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 # 10

Which force is not a conservative force?

Frictional force A
Gravitational force B
Electric force C
Elastic spring force D

Question # 11

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 # 12

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

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

Question # 13

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

0.5 J A
2 J B
0.25 J C
1 J D

Question # 14

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 # 15

A solar cell is made from:

Iron A
Silicon B
Germanium C
Copper D

Question # 16

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

Positive A
Negative B
Zero C
None of these D

Question # 17

Watt x second is unit of:

Force A
Work B
Power C
None of these D

Question # 18

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

0° A
90° B
180° C
None of these D

Question # 19

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 # 20

Energy stored in the spring of a watch is called

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

Question # 21

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:

Power A
Work B
Pressure C
None of these D

Question # 22

SI Unit of work is

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

Question # 23

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 24

The tidal energy is produced due to rotation of Earth relative to:

Moon A
Sun B
Oceans C
Water D

Question # 25

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

Conservative field A
Non-conservative field B
Electric field C
None of these D

Question # 26

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 # 27

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:

+5 X 10¹J A
+5 X 10²J B
+5 X 10³J C
+5 X 10⁴J D

Question # 28

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

Nuclear field A
Conservative field B
Electric field C
Gravitational field D

Question # 29

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 # 30

The unit of work in CGS system is

Joule A
Erg B
Dyne C
Watt D

Sr.#	Question	Answer
1	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
2	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
3	The dimensions of work	A. [MLT^-1] B. [MLT^-2] C. [ML²T^-2] D. [MLT]
4	Work has a dimension as that of:	A. Torque B. Angular momentum C. Linear momentum D. Power
5	Work has the dimension as that of:	A. Torque B. Angular momentum C. Linear momentum D. Power
6	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
7	Maximum work is done when force and displacement are	A. Parallel B. Antiparallel C. Perpendicular D. Both a and b
8	Energy stored in the spring of a watch is called	A. Potential energy B. Kinetic energy C. Nuclear energy D. Elastic potential
9	Work done along a closed path in a gravitational field is:	A. Maximum B. Minimum C. Zero D. Unity
10	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

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