Question # 1

Tick the conservation force:

Choose an answer

Tension in a string

Air resistance force

Elastic spring

Frictional force

Work done is lowering the bucket into the well is:

Choose an answer

Zero

Positive

Negative

None of these

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

Choose an answer

Greater

Smaller

Equal

None of thes

When velocity of moving body is doubled, the quantity which is also doubled is its:

Choose an answer

K.E.

Acceleration

Momentum

P.E.

Work done is maximum when angle between force and displacement is

Choose an answer

0°

90°

180°

None of these

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

Choose an answer

0°

90°

180°

None of these

The work done on the body will be zero if:

Choose an answer

No force is applied on the body

Force is applied but no displacement

Angle between F(force) and d(displacement) is 90°

All of these are correct

A solar cell converts energy of the Sun into:

Choose an answer

Heat energy

Magnetic energy

Light energy

Sound energy

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:

Choose an answer

1.25 J

12.5 J

125 J

None of these

Most of the geysers occur in:

Choose an answer

Volcanic regions

Magnetic regions

Northern region

None of these

The angle between centripetal force and displacement of the body moving in a circle is:

Choose an answer

0°

90°

180°

None of these

Which force is not a conservative force?

Choose an answer

Frictional force

Gravitational force

Electric force

Elastic spring force

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

Choose an answer

Potential

Chemical

Mechanical

sound and heat

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:

Choose an answer

+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

Which one is conservative force

Choose an answer

Electric force

Frictional force

Normal force

Air resistance

Work done by the force of friction is always

Choose an answer

Positive

Zero

Negative

Maximum

1 J = ________?

Choose an answer

10⁷erges

10^-7erges

10⁵erges

10^-5erges

Which of the following types of force can do no work on the particle on which it acts

Choose an answer

Frictional force

Gravitational force

Electric force

Centripetal force

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

Choose an answer

1 dyne

1 joule

1KJ

1 Watt

Work has the dimensions as that of

Choose an answer

Torque

Angular momentum

Linear momentum

Power

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

Choose an answer

Maximum

Minimum

Zero

Negative

The work performed on an object does not depend on:

Choose an answer

Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

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

Choose an answer

Unity

Infinity

Zero

-Fd

The commercial unit of electrical energy is :

Choose an answer

K Watt

KWH

Horse power

Joule

The power of an electric generating station is expressed in:

Choose an answer

Kilo Jule

Kilowatt-hour

Kilo watt

Watt

The work performed on an object does not depend on:

Choose an answer

Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Choose an answer

mgh

Its wight

Weight X height

Zero

Work done is independent of path followed in _______

Choose an answer

Gravitational field

Magnetic field

Electric field

All of these

The space around the earth within which it expects a force of attraction on other bodies is known as:

Choose an answer

Nuclear field

Conservative field

Electric field

Gravitational field

Which of the following is not a unit of power:

Choose an answer

J-sec

Watt

N m/sec

Horsepower

The unit of work in CGS system is

Choose an answer

Joule

Erg

Dyne

Watt

More Classes

Other Links

ECAT Pre General Science Physics Chapter 4 Work and Energy Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer