ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

Which force is not a conservative force?

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

Question # 2

Work done is independent of path followed in _______

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

Question # 3

The dimensions of work

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

Question # 4

The power of an electric generating station is expressed in:

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

Question # 5

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 # 6

Work is product of:

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

Question # 7

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 # 8

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 # 9

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 # 10

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

Potential A
Chemical B
Mechanical C
sound and heat D

Question # 11

Work is a:

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

Question # 12

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 13

A solar cell converts energy of the Sun into:

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

Question # 14

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 # 15

A solar cell is made from:

Iron A
Silicon B
Germanium C
Copper D

Question # 16

Work is a

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

Question # 17

The consumption of energy by a 60 W bulb in 2 minutes is:

2 watt-hour A
120 watt-hour B
30 watt-hour C
None of these D

Question # 18

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 # 19

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 20

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 # 21

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 # 22

Most of the geysers occur in:

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

Question # 23

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

0° A
90° B
180° C
None of these D

Question # 24

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 # 25

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:

0° A
30° B
60° C
90° D

Question # 26

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 # 27

Work has the dimensions as that of

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 28

Which of the following is not a unit of power:

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

Question # 29

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 # 30

Watt x second is unit of:

Force A
Work B
Power C
None of these D

Sr.#	Question	Answer
1	Work is a always done on a body when	A. A force acts on it B. It moves through certain distance C. None of A or B is correct D. Both A and B are correct
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:	A. 2 J B. 0.25 J C. 1 J D. 0.5 J
3	The work done 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
4	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°
5	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
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	Work is always done on a body when:	A. A force acts on it B. It moves through certain distance C. None of A or B is correct D. Both A and B is correct
8	The space around the earth in which its gravitational force acts on a body is called	A. Electric Field B. Gravitational field C. Magnetic field D. Conservative field
9	The value of escape velocity of Earth planet comes out to be:	A. 11 m/sec B. 11 km/sec C. 11 km/hour D. 11 cm/sec
10	When two protons are brought are brought closer potential energy of both of them:	A. Increases B. Decreases C. Remains same D. None of these

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