ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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 # 2

Work has the dimensions as that of

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 3

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 # 4

The dimensions of work

[MLT^-1] A
[MLT^-2] B
[ML²T^-2] C
[MLT] D

Question # 5

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

Moon A
Sun B
Oceans C
Water D

Question # 6

Most of the geysers occur in:

Volcanic regions A
Magnetic regions B
Northern region C
None of these D

Question # 7

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

Maximum A
Minimum B
Zero C
Negative D

Question # 8

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 # 9

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

Potential A
Chemical B
Mechanical C
sound and heat D

Question # 10

Which of the following is not a unit of power:

J-sec A
Watt B
N m/sec C
Horsepower D

Question # 11

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 # 12

Work is a Quantity

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

Question # 13

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 # 14

The types of mechanical energy is/are:

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

Question # 15

Power is a :

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

Question # 16

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:

60° A
90° B
30° C
0° D

Question # 17

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 # 18

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

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

Question # 19

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 # 20

The energy stored int he water of the dam is:

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

Question # 21

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 # 22

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

Greater A
Smaller B
Equal C
None of thes D

Question # 23

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 # 24

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

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

Question # 25

Work is a:

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

Question # 26

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 # 27

Teh consumption of energy by a 1000 watt heater in half an hour is:

5 Kwh A
0.5 Kwh B
2.5 Kwh C
3.2 Kwh D

Question # 28

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

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

Question # 29

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 30

The power of an electric generating station is expressed in:

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

Sr.#	Question	Answer
1	The field in which work done is moving body between two points depends upon the path followed is called:	A. Conservative filed B. Non-conservative field C. Electric field D. None of these
2	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
3	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
4	If force and displacement are in opposite direction, the work done is taken as:	A. Positive work B. Negative work C. Zero work D. Infinte work
5	Work done is maximum when angle between force and displacement is:	A. 0° B. 90° C. 180° D. None of these
6	Tick the conservation force:	A. Tension in a string B. Air resistance force C. Elastic spring D. Frictional force
7	Tick the conservative force	A. Tension in a string B. Air resistance C. Elastic spring D. Frictional force
8	A two Kg block is held 1 m above the floor for 50 seconds, the work done is:	A. Zero B. 10.2 J C. 100 J D. 980 J
9	Work done is maximum when angle between force and displacement is	A. 0° B. 90° C. 180° D. None of these
10	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

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