Question # 1

Which gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

Convention is done by ____________

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Vibration of atoms

Actual movement of particles

Same as conduction

Nil

Metals are good conductor of heat due to

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Free Electrons

Big size of their molecules

Small size of their molecules

Rapid vibrations of their atoms

Convection of heat is the process of heat transfer due to the

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Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

How does heat reaches form sun to earth through?

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Conduciton

Convection

Radiation

None

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

Shining silvered surface is a best:

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Emitter

Absorber

Reflector

None of these

Heat can be transmitted form one object to the other by

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convection

radiation

conduction

all of these

Which of the following is a good radiator of heat?

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A shining slivered surface

A dull black surface

A white surface

A green coloured surfaced

Water is _________ conductor:

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Best

Bad

Good

Poor

Birds are able to fly on ____________

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Radiations

Thermals

Air

Layers

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

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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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