ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

The energy stored int he water of the dam is:

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

Question # 2

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 # 3

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

Maximum A
Minimum B
Zero C
None of these D

Question # 4

Tick the conservation force:

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

Question # 5

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 # 6

Work is a:

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

Question # 7

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 # 8

The dimensions of work

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

Question # 9

SI Unit of work is

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

Question # 10

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 # 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

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 # 13

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 # 14

The commercial unit of electrical energy is :

K Watt A
KWH B
Horse power C
Joule D

Question # 15

Which of the following is not a unit of power:

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

Question # 16

The types of mechanical energy is/are:

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

Question # 17

Work is a

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

Question # 18

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 # 19

The work done 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 # 20

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 21

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 # 22

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 # 23

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 # 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

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

Question # 26

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 # 27

Work has a dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 28

Work done is independent of path followed in _______

Gravitational field A
Magnetic field B
Electric field C
All of these D

Question # 29

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 # 30

Work has the dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Sr.#	Question	Answer
1	Tick the conservation force:	A. Tension in a string B. Air resistance force C. Elastic spring D. Frictional force
2	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
3	A 2 kg block is held 1 m above floor for 50 seconds. The work done is:	A. Zero B. 10.2 J C. 100 J D. 980 J
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	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°
6	The consumption of energy by a 60 W bulb in 2 minutes is:	A. 2 watt-hour B. 120 watt-hour C. 30 watt-hour D. None of these
7	Escape velocity from surface of Moon as compared to that from Earth surface is:	A. Greater B. Smaller C. Equal D. None of thes
8	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:	A. +5 x 10¹J B. +5 x 10²J C. +5 x 10³J D. +5 x 10⁴J
9	The commercial unit of electrical energy is :	A. K Watt B. KWH C. Horse power D. Joule
10	Work is a Quantity	A. Vector B. Scalar C. Non-physical D. None of these

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