Question # 1

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

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Nuclear field

Conservative field

Electric field

Gravitational field

Tick the conservation force:

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Tension in a string

Air resistance force

Elastic spring

Frictional force

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

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Positive work

Negative work

Zero work

Infinite work

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

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Unity

Infinity

Zero

-Fd

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

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Zero

10.2 J

100 J

980 J

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:

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60°

90°

30°

0°

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

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Direction

Force applied

Path followed by the body

Power

Tick the conservative force

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Tension in a string

Air resistance

Elastic spring

Frictional force

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

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11 m/sec

11 km/sec

11 km/hour

11 cm/sec

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

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

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Increases

Decreases

Remains same

None of these

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

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

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0°

90°

180°

None of these

Maximum work is done when force and displacement are

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Parallel

Antiparallel

Perpendicular

Both a and b

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

Work done in lower and bucket into the well is:

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Zero

Positive

Negative

None of these

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

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Maximum

Minimum

Zero

Unity

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

The work performed on an object does not depend on

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

The work done on the body will be zero if:

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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

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

Which of the following is not a unit of power:

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J-sec

Watt

N m/sec

Horsepower

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

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Much more

Very small

No amount at all

None of these

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

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Positive work

Negative work

Zero work

Infinite work

Which one is conservative force

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Electric force

Frictional force

Normal force

Air resistance

The power of an electric generating station is expressed in:

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Kilo Jule

Kilowatt-hour

Kilo watt

Watt

The commercial unit of electrical energy is :

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K Watt

KWH

Horse power

Joule

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

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Potential

Chemical

Mechanical

sound and heat

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:

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Power

Work

Pressure

None of these

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