ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

Tick the conservation force:

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

Question # 2

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 # 3

Power is a :

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

Question # 4

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 # 5

Work done is independent of path followed in _______

Gravitational field A
Magnetic field B
Electric field C
All of these D

Question # 6

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

0.5 Kwn A
2 Kwh B
1 Kwh C
None of these D

Question # 7

When a falling body hits ground, its KE changes to _____ energy.

Potential A
Chemical B
Mechanical C
sound and heat D

Question # 8

Work has the dimensions as that of

Torque A
Angular momentum B
Linear momentum C
Power D

Question # 9

Energy stored in the spring of a watch is called

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

Question # 10

The work done by a force, keeping an object in circular motion with constant speed is:

Zero J A
1 J B
0.1 J C
0.01 J D

Question # 11

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 # 12

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 # 13

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 # 14

A solar cell is made from:

Iron A
Silicon B
Germanium C
Copper D

Question # 15

The commercial unit of electrical energy is :

K Watt A
KWH B
Horse power C
Joule D

Question # 16

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 # 17

Work done by the force of friction is always

Positive A
Zero B
Negative C
Maximum D

Question # 18

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 # 19

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 # 20

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 # 21

The dimensions of work

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

Question # 22

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

0° A
90° B
180° C
None of these D

Question # 23

Work is a Quantity

Vector A
Scalar B
Non-physical C
None of these D

Question # 24

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 # 25

Work is a:

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

Question # 26

The work done in 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 # 27

1 J = ________?

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

Question # 28

The work done by a force keeping an object in circular motion with constant speed is:

Zero J. A
0.1 J B
1 J C
0.01 J D

Question # 29

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 # 30

Escape velocity from surface of Moon as compared to that from Earth surface is:

Greater A
Smaller B
Equal C
None of thes 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 in 25J. The angle which the force makes with the direction of motion will be	A. 60° B. 90° C. 30° D. 0°
2	Energy stored in the spring of a watch is called	A. Potential energy B. Kinetic energy C. Nuclear energy D. Elastic potential
3	SI Unit of work is	A. Nm^-1 B. Joule C. Nms D. Both a and b
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	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
6	Work is a	A. Scalar quantity B. Vector quantity C. Base quantity D. None of these
7	In the force applied to parallel to the direction of motion, then the work done is:	A. Positive B. Negative C. Zero D. None of these
8	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
9	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
10	The dimensions of work	A. [MLT^-1] B. [MLT^-2] C. [ML²T^-2] D. [MLT]

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