Question # 1

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

Transfer of heat by actual movement of molecules form hot place to cold place is called:

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Conduction

Convection

Radiation

None

Thermal conductivity of iron is Wm^-1 K^-1

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85

36

89

86

Which one is a good conductor?

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cotton

air

wool

iron

Example of bad conductor is:

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Wool

Iron

Graphite

Gold

Feathers of bird give good thermal:

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Conduction

Insulation

Convection

None of these

There are ______ modes of transfer of heat:

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1

2

3

4

Larger number of slots are made in radiators to increase:

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Surface temperature

Surface area

Both A and B

Nonr

In thermo flask radiation is stopped by using :

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Green color

Transparent

Silver color

Nil

What of the following is a god radiator of heat?

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a Shinning silvered surface

a dull black surface

a white black surface

a shinning colored surface

Which gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

More radiation is reflected by the surface.

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White

Coloured

Black

Rough

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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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