Question # 1

The main source of energy n the universe is:

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Moon

Stars

Sun

Planets

The process in which heat is transmitted form one body to another by the interaction of atoms and the movement of free electrons is known as

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convection

radiation

conduction

both (a) and (b)

The SI unit of thermal conductivity is

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Wm K-1

Wm-1K

Wm-1K -1

WmK

Convention is done by ____________

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Vibration of atoms

Actual movement of particles

Same as conduction

Nil

Transfer of heat by the actual movement of molecules from one place to the other is called

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conduction

convection

radiation

waves

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

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

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Conduction

Convection

Radiation

None

Which surface is best reflector of heat?

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dull black surface

coloured surface

white surface

shining slivered surface

In which hot liquid can remains hot:

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Glass

Lead

Thermos

Hot pot

The sun's surface temperature is :

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3,000 K

3,030 k

6,000 K

600 K

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

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Conduction

Convection

Radiation

Nil

Leslie's cube is filled with:

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Cold water

Hot water

Mercury

Air

The example of bad conductor is:

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Wool

Copper

Gold

Iron

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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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