Question # 1

Larger number of slots are made in radiators to increase:

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Surface temperature

Surface area

Both A and B

Nonr

The amount of heat absorb by body depends on the :

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Colour of the surface

Nature of surface

Texture of surface

Both A and B

The conduction is due to:

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They have high boiling point

Vibration of atoms

They have high melting point

None of above

The temperature of a black dull surface on heating :

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Rise Rapidly

Fall Rapidly

Becomes zero

Remain constant

In solids, Heat is transferred by:

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Radiation

Conduction

Convection

Absorption

Degree of hotness or coldness of the body is called:

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Heat capacity

Thermal conductivity

Heat

Temperture

The device used to stop conduction, convention and radiation:

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Thermometer

Thermo flask

Both

Nil

Shining silvered surface is a best:

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Emitter

Absorber

Reflector

None of these

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

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Conductor

Thermal conductor

Insulator

both a & b

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

Leslie's cube is filled with

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Cold water

Hot water

Mercury

Air

There are ______ modes of transfer of heat:

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1

2

3

4

Which one box is used to keep food hot and ice cream cold for long period?

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Iron box

Aluminium Box

Styrofoam box

Plastic box

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