ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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 # 2

The dimensions of work

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

Question # 3

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 # 4

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 # 5

Which of the following type of force can do no work on the particle on which it acts:

Frictional force A
Gravitational force B
Electric force C
Centripetal force D

Question # 6

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 # 7

Which of the following is not a unit of power:

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

Question # 8

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 9

Tick the conservative force

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

Question # 10

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

60° A
90° B
30° C
0° D

Question # 11

Which one is conservative force

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

Question # 12

Power is a :

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

Question # 13

A field in which the work done is moving a body along closed path is zero is called:

Nuclear filed A
Conservative field B
Gravitational field C
Non-conservative field D

Question # 14

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 # 15

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 # 16

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

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

Question # 17

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 # 18

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

Moon A
Sun B
Oceans C
Water D

Question # 19

Work is a:

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

Question # 20

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 # 21

The work done in moving a body between two points in a conservative field is independent of the

Direction A
Force applied B
Path followed by the body C
Power D

Question # 22

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 # 23

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

Zero A
10.2 J B
100 J C
980 J D

Question # 24

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 # 25

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

0° A
90° B
180° C
None of these 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

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 28

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 # 29

The power of an electric generating station is expressed in:

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

Question # 30

1 J = ________?

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

Sr.#	Question	Answer
1	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
2	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:	A. 60° B. 90° C. 30° D. 0°
3	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
4	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
5	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:	A. Minimum Work B. Maximum Work C. Zero Work D. Negative Work
6	The work done in moving a body between two points in a conservative field is independent of the	A. Direction B. Force applied C. Path followed by the body D. Power
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	The commercial unit of electrical energy is :	A. K Watt B. KWH C. Horse power D. Joule
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	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°

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