Question # 1

Poor conductor of heat is:

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Copper

Aluminium

Water

Iron

The sun's surface temperature is :

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3,000 K

3,030 k

6,000 K

600 K

In large building central heating system worms on the principle of

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conduction

convection

radiation

waves

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

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85

36

89

86

More radiation is reflected by the surface:

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White

Coloured

Black

Rough

The device used to stop conduction, convention and radiation:

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Thermometer

Thermo flask

Both

Nil

Good conductor is :

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Air

Wood

Iron

None

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

Rooms are heated using gas heater by:

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Conduction only

Convection and radiation

Radiation only

Convection only

Convention is done by ____________

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Vibration of atoms

Actual movement of particles

Same as conduction

Nil

In solids, Heat is transferred by:

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Radiation

Conduction

Convection

Absorption

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

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Conduction

Convection

Radiation

None

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

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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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