Question # 1

Rooms are heated using gas heaters by

Choose an answer

Conduction only

Convection and radiation

Radiation only

Convection only

Land breeze from land to sea during:

Choose an answer

Day

Night

Afternoon

Morning

Dull black surface is a best:

Choose an answer

Emitter

Absorber

Reflector

None of these

In thermo flask radiation is stopped by using :

Choose an answer

Green color

Transparent

Silver color

Nil

In building central heating system works on the process of:

Choose an answer

Covection

Radiation

Conduction

both a and b

Convection of heat is the process of heat transfer due to the

Choose an answer

Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

Which one is a good conductor?

Choose an answer

cotton

air

wool

iron

In solids, Heat is transferred by:

Choose an answer

Radiation

Conduction

Convection

Absorption

Coloured surface is a

Choose an answer

Best emitter

Good emitter

Bad emitter

Wrost emitter

Birds are able to fly on ____________

Choose an answer

Radiations

Thermals

Air

Layers

The SI unit of thermal conductivity is

Choose an answer

Wm K-1

Wm-1K

Wm-1K -1

WmK

Convention is done by ____________

Choose an answer

Vibration of atoms

Actual movement of particles

Same as conduction

Nil

In large building central heating system worms on the principle of

Choose an answer

conduction

convection

radiation

waves

More Classes

Other Links

Physics 9th Class English Medium Unit 9 Online Test 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