Chief Editor
Chief Editor
 Oct 12, 2022
0

In solids, heat is transferred by

Difficulty: Easy
A:

Radiation

B:

Conduction

C:

Convention

D:

Absorption

What happens to the thermal conductivity of a wall if its thickness is doubled

Difficulty: Medium
A:

Becomes double

B:

Remains the same

C:

Becomes half

D:

Becomes one fourth

Metals are good conductors of heat due to

Difficulty: Easy
A:

Free electrons

B:

Big sizes of their moecules

C:

Small sizes of their molecules

D:

Rapid vibrations pf their atoms

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In gases, heat s mainly transferred by

Difficulty: Easy
A:

Conduction

B:

Radiation

C:

Convention

D:

Absorption

Convention of heat is the process of heat transfer due to

Difficulty: Medium
A:

Random motion of molecules

B:

Downward motion of molecules

C:

Upward movement of molecules

D:

Free movement of molecules

False ceiling is done to

Difficulty: Easy
A:

Lower heat of ceiling

B:

Keep the roof clean

C:

Radiation only

D:

Insulation the ceiling

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Rooms are heated using gas heaters by

Difficulty: Easy
A:

Conduction only

B:

Convention and radiation

C:

Radiation only

D:

Convention only

Land breezes blows from

Difficulty: Easy
A:

Sea to land during night

B:

Sea to land during day

C:

Land to sea during night

D:

Land to sea during day

Which of the following is a good radiator of heat

Difficulty: Easy
A:

A shiny silvered surface

B:

A dull black surface

C:

A white surface

D:

A green colored surface

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