Question # 1

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

Which of the following is not a unit of power:

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J-sec

Watt

N m/sec

Horsepower

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

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

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2 watt-hour

120 watt-hour

30 watt-hour

None of these

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

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Greater

Smaller

Equal

None of thes

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

Work is a scalar product of

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Force, Velocity

Velocity, Displacement

Force, Displacement

Force, Momentum

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

The tidal energy is produced due to rotation of Earth relative to:

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Moon

Sun

Oceans

Water

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

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Frictional force

Gravitational force

Electric force

Centripetal force

Work has a dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

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

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Unity

Infinity

Zero

-Fd

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