ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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 # 2

The power of an electric generating station is expressed in:

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

Question # 3

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 # 4

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

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

Question # 5

Work done along a closed path in a gravitational field is:

Maximum A
Minimum B
Zero C
Unity D

Question # 6

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 # 7

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 # 8

Power is a :

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

Question # 9

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 # 10

A labourer carrying a distance a load on his head moves from 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

Work done is maximum when angle between force and displacement is

0° A
90° B
180° 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

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 # 14

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 15

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 # 16

Which force is not a conservative force:

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

Question # 17

Which one is conservative force

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

Question # 18

A solar cell converts energy of the Sun into:

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

Question # 19

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 # 20

The tidal energy is due to gravitational pull of :

sun A
moon B
Mars C
None of these D

Question # 21

Work is a

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

Question # 22

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 # 23

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 # 24

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 # 25

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 # 26

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 27

Most of the geysers occur in:

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

Question # 28

1 J = ________?

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

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	A field in which the work done in moving a body along closed path is zero is called	A. Nuclear Field B. Conservative field C. Gravitational field D. Non-conservative field
2	Maximum work is done when force and displacement are	A. Parallel B. Antiparallel C. Perpendicular D. Both a and b
3	A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be	A. 60° B. 90° C. 30° D. 0°
4	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:	A. Power B. Work C. Pressure D. None of these
5	Tick the conservation force:	A. Tension in a string B. Air resistance force C. Elastic spring D. Frictional force
6	The space around the earth within it exerts a force of attraction on other bodies of known as:	A. Nuclear field B. Conservative field C. Electric field D. Gravitational field
7	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
8	The ultimate source of money sources of energy is:	A. Sun B. Air C. Water D. Petroleum
9	Work done is maximum when angle between force and displacement is:	A. 0° B. 90° C. 180° D. None of these
10	Work is a Quantity	A. Vector B. Scalar C. Non-physical D. None of these

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