ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

The power of an electric generating station is expressed in:

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

Question # 2

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 # 3

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 # 4

Which force is not a conservative force:

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

Question # 5

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 # 6

Power is a :

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

Question # 7

Work is product of:

Force and velocity A
Heat and energy B
Force and displacement C
None of these D

Question # 8

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 9

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 # 10

The commercial unit of electrical energy is :

K Watt A
KWH B
Horse power C
Joule D

Question # 11

Which of the following is not a unit of power:

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

Question # 12

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 # 13

Tick the conservative force

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

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:

60° A
90° B
30° C
0° D

Question # 15

Which force is not a conservative force?

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

Question # 16

Watt x second is unit of:

Force A
Work B
Power C
None of these 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

Work has the dimensions as that of

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 19

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 # 20

The dimensions of work

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

Question # 21

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 # 22

Maximum work is done when force and displacement are

Parallel A
Antiparallel B
Perpendicular C
Both a and b D

Question # 23

Work has a dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 24

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 25

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 # 26

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 # 27

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 # 28

Energy stored in the spring of a watch is called

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

Question # 29

The unit of work in CGS system is

Joule A
Erg B
Dyne C
Watt D

Question # 30

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

Potential A
Chemical B
Mechanical C
sound and heat 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	Work is a Quantity	A. Vector B. Scalar C. Non-physical D. None of these
3	Work has the dimensions as that of	A. Torque B. Angular momentum C. Linear momentum D. Power
4	Maximum work is done when force and displacement are	A. Parallel B. Antiparallel C. Perpendicular D. Both a and b
5	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
6	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
7	Work done is maximum when angle between force and displacement is	A. 0° B. 90° C. 180° D. None of these
8	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
9	The types of mechanical energy is/are:	A. Kinetic energy B. Potential energy C. Both of these D. None of these
10	Work done is lowering the bucket into the well is:	A. Zero B. Positive C. Negative D. None of these

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