ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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 # 2

1 J = ________?

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

Question # 3

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 4

Work done is maximum when angle between force and displacement is:

0° A
90° B
180° C
None of these D

Question # 5

Tick the conservative force

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

Question # 6

Work has a dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 7

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

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

Question # 8

Work is product of:

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

Question # 9

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 # 10

Work has the dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 11

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 # 12

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

Moon A
Sun B
Oceans C
Water D

Question # 13

Most of the geysers occur in:

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

Question # 14

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 # 15

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 # 16

When velocity of moving body is doubled, the quantity which is also doubled is its:

K.E. A
Acceleration B
Momentum C
P.E. D

Question # 17

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 # 18

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 # 19

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 # 20

Energy stored in the spring of a watch is called

Potential energy A
Kinetic energy B
Nuclear energy C
Elastic potential 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

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 23

Which of the following is not a unit of power:

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

Question # 24

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 # 25

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:

Power A
Work B
Pressure C
None of these D

Question # 26

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 # 27

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 # 28

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 29

SI Unit of work is

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

Question # 30

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

Sr.#	Question	Answer
1	Tick the conservative force	A. Tension in a string B. Air resistance C. Elastic spring D. Frictional force
2	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
3	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
4	In the force applied is parallel to the direction of motion, then work done is:	A. Maximum B. Minimum C. Zero D. None of these
5	Work is a:	A. Scalar quantity B. Vector quantity C. Base quantity D. None of these
6	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
7	When the body is moves against the force of friction on a horizontal plane, the work done by the body is:	A. Positive B. Negative C. Zero D. None of these
8	The space around the earth within which it expects a force of attraction on other bodies is known as:	A. Nuclear field B. Conservative field C. Electric field D. Gravitational field
9	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:	A. 0° B. 30° C. 60° D. 90°
10	Teh consumption of energy by a 1000 watt heater in half an hour is:	A. 5 Kwh B. 0.5 Kwh C. 2.5 Kwh D. 3.2 Kwh

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