ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

The types of mechanical energy is/are:

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

0.5 J A
2 J B
0.25 J C
1 J D

Question # 3

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 # 4

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 # 5

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 # 6

Maximum work is done when force and displacement are

Parallel A
Antiparallel B
Perpendicular C
Both a and b D

Question # 7

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 # 8

A solar cell converts energy of the Sun into:

Heat energy A
Magnetic energy B
Light energy C
Sound energy D

Question # 9

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 # 10

Work-energy principle states that work done on the body by applied force is equal to change in:

Potential energy A
Kinetic nergy B
Linear momentum C
None of these D

Question # 11

When a wall is pushed by a person very strongly, he has done:

Maximum work A
Zero work B
Positive work C
Negative work D

Question # 12

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 # 13

1 J = ________?

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

Question # 14

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

mgh A
Its wight B
Weight X height C
Zero D

Question # 15

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 16

Which force is not a conservative force:

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

Question # 17

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 # 18

Power is a :

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

Question # 19

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 # 20

Work is a

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

Question # 21

If force and displacement are in opposite direction, the work done is taken as:

Positive work A
Negative work B
Zero work C
Infinite work D

Question # 22

The energy stored int he water of the dam is:

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

Question # 23

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 # 24

The dimensions of work

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

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 the direction of motion will be:

60° A
90° B
30° C
0° D

Question # 27

Work done is independent of path followed in _______

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

Question # 28

Work is product of:

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

Question # 29

The power of an electric generating station is expressed in:

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

Question # 30

Work is a scalar product of

Force, Velocity A
Velocity, Displacement B
Force, Displacement C
Force, Momentum D

Sr.#	Question	Answer
1	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
2	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
3	When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:	A. 2 J B. 0.25 J C. 1 J D. 0.5 J
4	The angle between centripetal force and displacement of the body moving in a circle is:	A. 0° B. 90° C. 180° D. None of these
5	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:	A. 60° B. 90° C. 30° D. 0°
6	Work done is independent of path followed in _______	A. Gravitational field B. Magnetic field C. Electric field D. All of these
7	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:	A. +5 X 10¹J B. +5 X 10²J C. +5 X 10³J D. +5 X 10⁴J
8	Work has a dimension as that of:	A. Torque B. Angular momentum C. Linear momentum D. Power
9	If force and displacement are in opposite direction, the work done is taken as:	A. Positive work B. Negative work C. Zero work D. Infinite work
10	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

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