Question # 1

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

Choose an answer

Carbon dioxide

Nitrogen

Oxygen

Methane

Falls ceiling is done to:

Choose an answer

Lower the height of ceiling

Keep the roof clean

Cool the room

Insulate the ceiling

The earth temperature is :

Choose an answer

300 K

200 k

100 K

50 K

The conduction is due to:

Choose an answer

They have high boiling point

Vibration of atoms

They have high melting point

None of above

Unit of thermal conductivity is .

Choose an answer

Wmk

W m^-1 K^-1

Wm

None of these

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

Choose an answer

Conductor

Thermal conductor

Insulator

Both a & b

Which surface is best reflector of heat?

Choose an answer

dull black surface

coloured surface

white surface

shining slivered surface

In solid, heat is transferred by:

Choose an answer

Radiation

Conduction

Convection

Absorption

False celling is done to

Choose an answer

Lower the height of ceiling

Keep the roof clean

cool and room

Insulate the ceiling.

The substances through which heat does not conduct:

Choose an answer

Conductors

Bad conductors

Insulators

Both B and C

The process in which heat is transfer due to actual movement of molecule is called.

Choose an answer

Conduction

radiation

Convection

All of these

Leslie cube have faces:

Choose an answer

2

3

4

5

Heat radiation obey the laws of:

Choose an answer

Absorption

Reflection

Both A and B

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