Question # 1

If heat Q flows in time 't' through some metal then rate of flow of heat is defined as

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Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

At night , the air from land to begins towards sea called:

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Land breeze

Sea breaze

Both A and B

Radiation

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

How does heat reaches form sun to earth through?

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Conduciton

Convection

Radiation

None

The device used to stop conduction, convention and radiation:

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Thermometer

Thermo flask

Both

Nil

Metals are good conductors of heat due to :

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Free electrons

Big size of molecules

Small size of molecules

None of these

The bad conductor of heat is:

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Iron

Copper

Air

Aluminum

The quantity of heat absorbed by the body depends upon:

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Colour of surface

Nature of surface

Shape of surface

Both a & b

Heat reflected form the body depends upon :

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Colour and form

Form and speed

Color and speed

None

____________ from sun are major source of energy on earth.

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Light

Radiation

Both a & b

None of these

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

Leslie's cube is filled with

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Cold water

Hot water

Mercury

Air

Glass and transparent polythene sheets allow radiations of wavelength to pass through them:

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Long

Short

Medium

All

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9th Class Physics Chapter 9 Transfer of Heat English Medium KPK Boards Online Mcqs MCQs With Answers

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