Question # 1

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

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0.5 J

2 J

0.25 J

1 J

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 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

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

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

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Minimum Work

Maximum Work

Zero Work

Negative Work

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

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

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Unity

Infinity

Zero

-Fd

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

A solar cell is made from:

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Iron

Silicon

Germanium

Copper

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:`

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Minimum work

Maximum work

Zero work

Negative work

1 J = ________?

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10⁷erges

10^-7erges

10⁵erges

10^-5erges

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

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

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0°

90°

180°

None of these

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

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