Question # 1

In gases, heat in mainly transferred by:

Choose an answer

Molecular collision

Conduction

Convection

Radiaiton

Those objects which do not conduct electricity are called.

Choose an answer

Insulator

Semi conductor

Nil

Conduct

In which hot liquid can remains hot:

Choose an answer

Glass

Lead

Thermos

Hot pot

Good conductor is :

Choose an answer

Air

Wood

Iron

None

____________ from sun are major source of energy on earth.

Choose an answer

Light

Radiation

Both a & b

None of these

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

Choose an answer

Conductor

Thermal conductor

Insulator

both a & b

Which one is a good conductor?

Choose an answer

cotton

air

wool

iron

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

Choose an answer

convection

radiation

conduction

both (a) and (b)

The sun's surface temperature is :

Choose an answer

3,000 K

3,030 k

6,000 K

600 K

Larger number of slots are made in radiators to increase:

Choose an answer

Surface temperature

Surface area

Both A and B

Nonr

Which surface is bad emitter:

Choose an answer

White surface

Black surface

Coloured surface

Silver surface

Which of the following is a good radiator of heat?

Choose an answer

A shining slivered surface

A dull black surface

A white surface

A green coloured surfaced

Metals are good conductor of heat due to:

Choose an answer

Free electrons

Reamain same

Small size of their molecules

Rapid vibration of their atoms

Coloured surface is a

Choose an answer

Best emitter

Good emitter

Bad emitter

Wrost emitter

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

Choose an answer

Downward

Upward

Left

right

Radiation are emited by:

Choose an answer

Cold body

Hot body

All bodies

None

____________ is bad conductors of heat:

Choose an answer

Copper

Water

Wire

Nil

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

Choose an answer

Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

Heat reflected form the body depends upon :

Choose an answer

Colour and form

Form and speed

Color and speed

None

More Classes

Other Links

9th Class Physics Chapter 9 Transfer of Heat English Medium KPK Boards Online Mcqs MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer