Question # 1

................ causes coastal breeze.

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Conduction

Convection

Radiation

Nil

False celling is done to

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Lower the height of ceiling

Keep the roof clean

cool and room

Insulate the ceiling.

Falls ceiling is done to:

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Lower the height of ceiling

Keep the roof clean

Cool the room

Insulate the ceiling

All are conductors except:

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Copper

Wires

Steel

Wood

Thermos flask, is used to maintain:

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Heat

Temperature

Density

Pressure

The device used to stop conduction, convention and radiation:

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Thermometer

Thermo flask

Both

Nil

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

____________ from sun are major source of energy on earth.

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Light

Radiation

Both a & b

None of these

In thermo flask radiation is stopped by using :

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Green color

Transparent

Silver color

Nil

Unit of thermal conductivity is .

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Wmk

W m^-1 K^-1

Wm

None of these

The earth temperature is :

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300 K

200 k

100 K

50 K

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

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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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