ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

The value of escape velocity of Earth planet comes out to be:

11 m/sec A
11 km/sec B
11 km/hour C
11 cm/sec D

Question # 2

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

0° A
90° B
180° C
None of these D

Question # 3

The types of mechanical energy is/are:

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

Question # 4

When the body is 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 # 5

Which of the following is not a unit of power:

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

Question # 6

Work has a dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 7

SI Unit of work is

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

Question # 8

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 # 9

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 # 10

The dimensions of work

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

Question # 11

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 # 12

Work is a 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 are correct 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

Work is a:

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

Question # 15

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 # 16

Work has the dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power 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:

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

Question # 18

Which one is conservative force

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

Question # 19

If one newton force acts on a body and displaces the body through 1m work done on body is

1 dyne A
1 joule B
1KJ C
1 Watt D

Question # 20

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 21

Energy stored in the spring of a watch is called

Potential energy A
Kinetic energy B
Nuclear energy C
Elastic potential D

Question # 22

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 # 23

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 # 24

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:

+5 X 10¹J A
+5 X 10²J B
+5 X 10³J C
+5 X 10⁴J D

Question # 25

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 # 26

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 27

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 # 28

The unit of work in CGS system is

Joule A
Erg B
Dyne C
Watt D

Question # 29

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 # 30

Which force is not a conservative force?

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

Sr.#	Question	Answer
1	Work has the dimension as that of:	A. Torque B. Angular momentum C. Linear momentum D. Power
2	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
3	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
4	Which of the following is not a unit of power:	A. J-sec B. Watt C. N m/sec D. Horsepower
5	The commercial unit of electrical energy is :	A. K Watt B. KWH C. Horse power D. Joule
6	The tidal energy is produced due to rotation of Earth relative to:	A. Moon B. Sun C. Oceans D. Water
7	The field in which work done in moving a body between two points depends upon the path followed is called:	A. Conservative field B. Non-conservative field C. Electric field D. None of these
8	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°
9	Escape velocity from surface of Moon as compared to that from Earth surface is:	A. Greater B. Smaller C. Equal D. None of thes
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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