Question # 1

Which of the following is an insulator?

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Wood

Glass

Plastic

Steel

More radiation is reflected by the surface.

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White

Coloured

Black

Rough

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

On heating Air become:

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Heavier

Lighter

Remain same

None of these

The temperature of a black dull surface on heating :

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Rise Rapidly

Fall Rapidly

Becomes zero

Remain constant

Heat form one of a metal rod a reaches to the other by the process of

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convection

radiation

conduction

both (a) and (b)

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

Wood, cork,cotton, wool , rubber are the examples of:

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Conductor

Thermal conductor

Insulator

Both a & b

Rooms are heated using gas heaters by

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Conduction only

Convection and radiation

Radiation only

Convection only

The main source of energy in the unierse is:

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Moon

Stars

Sun

Planets

Flow of thermal energy from hot body cold body is called:

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Specific heat

Latent heat

Transfer of heat

Heat capacity

Leslie cube have faces:

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2

3

4

5

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