ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

Question # 1

A solar cell is made from:

Iron A
Silicon B
Germanium C
Copper D

Question # 2

Tick the conservative force

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

Question # 3

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 # 4

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

Unity A
Infinity B
Zero C
-Fd D

Question # 5

Tick the conservation force:

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

Question # 6

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 # 7

The types of mechanical energy is/are:

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

Question # 8

The energy stored int he water of the dam is:

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

Question # 9

Work done in lower and bucket into the well is:

Zero A
Positive B
Negative C
None of these D

Question # 10

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 # 11

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 # 12

Which force is not a conservative force:

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

Question # 13

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 # 14

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 # 15

1 J = ________?

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

Question # 16

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 # 17

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

0° A
90° B
180° C
None of these D

Question # 18

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 # 19

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 # 20

Work is a

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

Question # 21

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 # 22

Work is a:

Scalar quantity A
Vector quantity B
Base quantity 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 boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an 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 # 25

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 # 26

Work is product of:

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

Question # 27

The tidal energy is due to gravitational pull of :

sun A
moon B
Mars C
None of these D

Question # 28

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 # 29

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 # 30

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

Sr.#	Question	Answer
1	Work is a Quantity	A. Vector B. Scalar C. Non-physical D. None of these
2	Work done is maximum when angle between force and displacement is	A. 0° B. 90° C. 180° D. None of these
3	Work is a:	A. Scalar quantity B. Vector quantity C. Base quantity D. None of these
4	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:	A. +5 x 10¹J B. +5 x 10²J C. +5 x 10³J D. +5 x 10⁴J
5	A field in which the work done is moving a body along closed path is zero is called:	A. Nuclear filed B. Conservative field C. Gravitational field D. Non-conservative field
6	Work is a:	A. Scalar quantity B. Vector quantity C. Base quantity D. None of these
7	Work has the dimension as that of:	A. Torque B. Angular momentum C. Linear momentum D. Power
8	SI Unit of work is	A. Nm^-1 B. Joule C. Nms D. Both a and b
9	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
10	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:`	A. Minimum work B. Maximum work C. Zero work D. Negative work

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