Question # 1

The ratio of useful output to input energy is called:

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Power

Energy

Efficiency

Horse power

According to law of conservation of energy increases K.E is equal to:

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Increase P.E

Decrease P.E

Decrease K.E

None of these

As we go up the density of air in the atmosphere:

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Decreases

Increases

Remain constnat

None of these

__________ forces have opposite direction:

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Unlike parallel

Parallel

Like parallel

None of these

Hydraulic press is a machine which works on

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Hook's law

Archimedes principle

Pascal's law

Boyle's law

If the weight body is greater then tension then body will.

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Move upward

move downward

not move

None

P.E is calculated by a formula :

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Mgh

mg

gh

Nil

The ability of a body to do work is known as

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power

energy

kinetic energy

potential energy

Amount of heat that flows in unit time is called:

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Rate of flow of heat

Q/t

Conductivity

Both A and B

Centre of gravity of sphere is at:

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Centre of sphere

Outside of sphere

Radius of sphere

None of these

Land breeze blows from:

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Sea to land drawing night

Sea to land during day

Land to sea during night

Land to sea during day

According to Archimedes, up thrust is equal to :

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Weight of displaced liquid

Volume of displaced liquid

Mass of displaced liquid

None of these

The study of internal structur eof Earth is called.

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Atomic Physics

Plasma Physics

Geo physics

Nuclear Physics

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