Question # 1

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

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Conductor

Thermal conductor

Insulator

Both a & b

Water is _________ conductor:

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Best

Bad

Good

Poor

If heat Q flows in time 't' through some metal then rate of flow of heat is defined as

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Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

The example of bad conductor is:

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Wool

Copper

Gold

Iron

The radiation from sun is:

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Alpha

Gamma

Radio

Ultraviolet

Larger number of slots are made in radiators to increase:

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Surface temperature

Surface area

Both A and B

Nonr

Radiation are emited by:

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Cold body

Hot body

All bodies

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

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

There are ______ modes of transfer of heat:

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1

2

3

4

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

Heat is an important form of

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Matter

Energy

Wind

Force

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

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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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