Question # 1

A string is stretched by two equal and opposite force 10 N each. The tension in the string is:

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Zero

5 N

10 N

20 N

False celling is done to

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Lower the height of ceiling

Keep the roof clean

cool and room

Insulate the ceiling.

To every action there is always an equal but __________ reaction:

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Same

Parallel

Opposite

Equal

The power of electric kettle is 500W and takes 2s to heat up, find heat generated?

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E = 250 w

E = 1000 w

E = 10000 J

1KJ

A body OF mass 10 kg taken to height of 5m:

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P.E = 500 J

P.E = 50 J

P.E = 5 J

P.E = 5000 J

Parallel forces are those whose:

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^{Times of action are parallel}

Points of action are different

More than one forces

All of the given option

Gravitational pull of earth is called:

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Weight

Mass

^Force

Tension

Radiation are emited by:

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Cold body

Hot body

All bodies

None

When a block a place on the surface its weight produce.

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Tension

Momentum

Inertia

Normal reaction

Water freezes at .

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0^o F

32 ^oF

-273 K

0 K

A solar cell is also called:

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Photo cell

Generator

Battery

None

Least count of physical balance is.

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0.001 g

0.01 g

0.1 g

0.0001 g

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

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