ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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 # 2

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 # 3

Work is 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 is correct D

Question # 4

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 # 5

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

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

Question # 6

The angle between centripetal force and displacement of the body moving in a circle is:

0° A
90° B
180° C
None of these D

Question # 7

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 # 8

Watt x second is unit of:

Force A
Work B
Power C
None of these D

Question # 9

The tidal energy is due to gravitational pull of :

sun A
moon B
Mars C
None of these D

Question # 10

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 # 11

Which force is not a conservative force:

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

Question # 12

The power of an electric generating station is expressed in:

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

Question # 13

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 # 14

Work has a dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 15

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

Maximum A
Minimum B
Zero C
Negative D

Question # 16

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 # 17

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 # 18

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 # 19

The dimensions of work

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

Question # 20

Which of the following is not a unit of power:

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

Question # 21

Which force is not a conservative force?

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

Question # 22

Area under the force displacement graph gives

Power A
Work B
Heat C
Energy D

Question # 23

Work has the dimensions as that of

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 24

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 # 25

Work is a Quantity

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

Question # 26

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 # 27

When force and displacement are perpendicular to each other than work is equal to

Unity A
Infinity B
Zero C
-Fd D

Question # 28

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 # 29

Most of the geysers occur in:

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

Question # 30

1 J = ________?

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

Sr.#	Question	Answer
1	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
2	Maximum work is done when force and displacement are	A. Parallel B. Antiparallel C. Perpendicular D. Both a and b
3	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
4	The work done on the body will be zero if:	A. No force is applied on the body B. Force is applied but no displacement C. Angle between F(force) and d(displacement) is 90° D. All of these are correct
5	Which one is conservative force	A. Electric force B. Frictional force C. Normal force D. Air resistance
6	The field in which work done in moving a body between two points depends upon the path followed is called:	A. Conservative field B. Non-conservative field C. Electric field D. None of these
7	The work done in moving a body between two points in a conservation field is independent of the:	A. Direction B. Force applied C. Path followed by the body D. Power
8	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
9	Energy stored in the spring of a watch is called	A. Potential energy B. Kinetic energy C. Nuclear energy D. Elastic potential
10	The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is	A. Much more B. Very small C. No amount at all D. None of these

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