ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

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 # 2

Work is always done on a body when:

A force acts on it A
It moves through certain distance B
None of A and B is correct C
Both A and B is correct D

Question # 3

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 # 4

The dimensions of work

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

Question # 5

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

Maximum A
Minimum B
Zero C
Unity D

Question # 6

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 # 7

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 # 8

A solar cell converts energy of the Sun into:

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

Question # 9

Which of the following is not a unit of power:

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

Question # 10

Which of the following types 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 # 11

A solar cell is made from:

Iron A
Silicon B
Germanium C
Copper D

Question # 12

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 # 13

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 # 14

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 # 15

Work done on a body by gravity in lifting it up to certain height is

Maximum A
Minimum B
Zero C
Negative D

Question # 16

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 # 17

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 # 18

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 # 19

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 # 20

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 # 21

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

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

Question # 22

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 # 23

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 # 24

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 # 25

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 # 26

The commercial unit of electrical energy is :

K Watt A
KWH B
Horse power C
Joule D

Question # 27

Work done is maximum when angle between force and displacement is

0° A
90° B
180° C
None of these D

Question # 28

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 # 29

Area under the force displacement graph gives

Power A
Work B
Heat C
Energy D

Question # 30

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

Sr.#	Question	Answer
1	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
2	Work is always done on a body when:	A. A force acts on it B. It moves through certain distance C. None of A and B is correct D. Both A and B is correct
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 is 25J. The angle which the force makes the direction of motion will be:	A. 60° B. 90° C. 30° D. 0°
4	The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is	A. Much more B. Very small C. No amount at all D. None of these
5	Which of the following types of force can do no work on the particle on which it acts	A. Frictional force B. Gravitational force C. Electric force D. Centripetal force
6	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
7	Watt x second is unit of:	A. Force B. Work C. Power D. None of these
8	Work done is independent of path followed in _______	A. Gravitational field B. Magnetic field C. Electric field D. All of these
9	Energy stored in the spring of a watch is called	A. Potential energy B. Kinetic energy C. Nuclear energy D. Elastic potential
10	Work done in lower and bucket into the well is:	A. Zero B. Positive C. Negative D. None of these

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students