ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

Work has the dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power 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

A solar cell is made from:

Iron A
Silicon B
Germanium C
Copper D

Question # 4

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 # 5

Area under the force displacement graph gives

Power A
Work B
Heat C
Energy D

Question # 6

Which of the following is not a unit of power:

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

Question # 7

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 # 8

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 # 9

Work done is lowering the bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 10

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 # 11

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 # 12

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

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

Question # 13

Work has a dimension as that of:

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 14

The types of mechanical energy is/are:

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

Question # 15

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 16

Work is 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 is correct D

Question # 17

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:

Minimum Work A
Maximum Work B
Zero Work C
Negative Work D

Question # 18

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 # 19

Work is a

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

Question # 20

The dimensions of work

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

Question # 21

Tick the conservative force

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

Question # 22

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 # 23

The ultimate source of money sources of energy is:

Sun A
Air B
Water C
Petroleum D

Question # 24

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 25

When force and displacement are perpendicular to each other than work is equal to

Unity A
Infinity B
Zero C
-Fd D

Question # 26

The field in which work done in moving a body between two points depends upon the path followed is called:

Conservative field A
Non-conservative field B
Electric field C
None of these D

Question # 27

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 # 28

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 # 29

Which force is not a conservative force:

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

Question # 30

Work is product of:

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

Sr.#	Question	Answer
1	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°
2	If work is done at the rate of 2 k j per second, then total work done is half an hour will be:	A. 0.5 Kwn B. 2 Kwh C. 1 Kwh D. None of these
3	A two Kg block is held 1 m above the floor for 50 seconds, the work done is:	A. Zero B. 10.2 J C. 100 J D. 980 J
4	When a wall is pushed by a person very strongly, he has done:	A. Maximum work B. Zero work C. Positive work D. Negative work
5	Area under the force displacement graph gives	A. Power B. Work C. Heat D. Energy
6	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
7	A solar cell converts energy of the Sun into:	A. Heat energy B. Magnetic energy C. Light energy D. Sound energy
8	Which force is not a conservative force?	A. Frictional force B. Gravitational force C. Electric force D. Elastic spring force
9	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
10	The dimensions of work	A. [MLT^-1] B. [MLT^-2] C. [ML²T^-2] D. [MLT]

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