Question # 1

The consumption of energy by a 60 W bulb in 2 minutes is:

Choose an answer

2 watt-hour

120 watt-hour

30 watt-hour

None of these

Work done is independent of path followed in _______

Choose an answer

Gravitational field

Magnetic field

Electric field

All of these

The unit of work in CGS system is

Choose an answer

Joule

Erg

Dyne

Watt

Work is a:

Choose an answer

Scalar quantity

Vector quantity

Base quantity

None of these

Work is always done on a body when:

Choose an answer

A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B is correct

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

Choose an answer

60°

90°

30°

0°

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

Choose an answer

Positive

Negative

Zero

None of these

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

When two protons are brought are brought closer potential energy of both of them:

Choose an answer

Increases

Decreases

Remains same

None of these

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

Energy stored in the spring of a watch is called

Choose an answer

Potential energy

Kinetic energy

Nuclear energy

Elastic potential

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:

Choose an answer

+5 X 10¹J

+5 X 10²J

+5 X 10³J

+5 X 10⁴J

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:

Choose an answer

Power

Work

Pressure

None of these

The work done in moving a body between two points in a conservative field is independent of the

Choose an answer

Direction

Force applied

Path followed by the body

Power

Work has the dimension as that of:

Choose an answer

Torque

Angular momentum

Linear momentum

Power

Which one is conservative force

Choose an answer

Electric force

Frictional force

Normal force

Air resistance

Work is a Quantity

Choose an answer

Vector

Scalar

Non-physical

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

The dimensions of work

Choose an answer

[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Choose an answer

Zero

10.2 J

100 J

980 J

The value of escape velocity of Earth planet comes out to be:

Choose an answer

11 m/sec

11 km/sec

11 km/hour

11 cm/sec

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

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

Choose an answer

0.5 J

2 J

0.25 J

1 J

The types of mechanical energy is/are:

Choose an answer

Kinetic energy

Potential energy

Both of these

None of these

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

Choose an answer

0°

90°

180°

None of these

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

Choose an answer

K.E.

Acceleration

Momentum

P.E.

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

Choose an answer

0.5 J

2 J

0.25 J

1 J

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

Work is product of:

Choose an answer

Force and velocity

Heat and energy

Force and displacement

None of these

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

Choose an answer

Positive work

Negative work

Zero work

Infinite work

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