ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

Tick the conservation force:

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

Question # 2

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 # 3

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 # 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

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 # 6

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 # 7

The tidal energy is due to gravitational pull of :

sun A
moon B
Mars C
None of these D

Question # 8

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 # 9

Which one is conservative force

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

Question # 10

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 # 11

Work is a:

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

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 # 14

The types of mechanical energy is/are:

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

Question # 15

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 16

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 17

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 # 18

Maximum work is done when force and displacement are

Parallel A
Antiparallel B
Perpendicular C
Both a and b D

Question # 19

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 # 20

Area under the force displacement graph gives

Power A
Work B
Heat C
Energy D

Question # 21

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

Potential A
Chemical B
Mechanical C
sound and heat D

Question # 22

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 # 23

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 # 24

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 # 25

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 # 26

Work is a

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

Question # 27

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 # 28

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 # 29

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 30

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an 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

Sr.#	Question	Answer
1	The commercial unit of electrical energy is :	A. K Watt B. KWH C. Horse power D. Joule
2	Energy stored in the spring of a watch is called	A. Potential energy B. Kinetic energy C. Nuclear energy D. Elastic potential
3	Work is a:	A. Scalar quantity B. Vector quantity C. Base quantity D. None of these
4	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:	A. 1.25 J B. 12.5 J C. 125 J D. None of these
5	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
6	A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:	A. 0° B. 30° C. 60° D. 90°
7	The work done by a force keeping an object in circular motion with constant speed is:	A. Zero J. B. 0.1 J C. 1 J D. 0.01 J
8	Escape velocity from surface of Moon as compared to that from Earth surface is:	A. Greater B. Smaller C. Equal D. None of thes
9	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
10	If work is done at the rate of 2 k j per second, then total work done is half an hour will be:	A. 0.5 Kwn B. 2 Kwh C. 1 Kwh D. None of these

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