Question # 1

Example of bad conductor is:

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Wool

Iron

Graphite

Gold

During recent years the percentage of __________ increased considerably on earth:

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Carbon dioxide

Nitrogen

Oxygen

Methane

A Leslie cube is use to identify :

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Radiation

Conduction

Convection

Both A and B

The brids stretch out their wings and circle in the rising currents of hot air called

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conduction

convection

radiation

thermals

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

Heat reflected form the body depends upon :

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Colour and form

Form and speed

Color and speed

None

A silvery white surface is a :

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Worst reflector

Best reflector

Worst absorber

Best absorber

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

____________ from sun are major source of energy on earth.

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Light

Radiation

Both a & b

None of these

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

All bodies absorb or emit energy by

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convection

radiation

conduction

both (a) & (c)

Glass and transparent polythene sheets allow radiations of wavelength to pass through them:

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Long

Short

Medium

All

Glider pilots use __________ movement of hot air currents due to convection of heat:

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Downward

Upward

Left

right

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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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