Heat NEET Questions

Physics - Thermodynamics

Heat MCQ Questions


7.
The SI unit of thermal conductivity is:
A.
W/m·K
B.
J/kg·K
C.
W/m²
D.
J/m·s
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ANSWER :
A. W/m·K
8.
Which law states that the rate of heat transfer is proportional to the temperature gradient and area?
A.
Newton's Law of Cooling
B.
Stefan-Boltzmann Law
C.
Fourier's Law of Heat Conduction
D.
Planck's Law
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ANSWER :
C. Fourier's Law of Heat Conduction
9.
The heat transfer by the mass movement of molecules is known as:
A.
Conduction
B.
Convection
C.
Radiation
D.
Reflection
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ANSWER :
B. Convection
10.
Which material has the highest thermal conductivity?
A.
Wood
B.
Glass
C.
Copper
D.
Air
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ANSWER :
C. Copper
11.
The process of heat transfer from the sun to the earth is primarily by:
A.
Conduction
B.
Convection
C.
Radiation
D.
Conduction and Convection
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ANSWER :
C. Radiation
12.
The heat required to convert 1 kg of solid to liquid at its melting point is called:
A.
Specific heat capacity
B.
Latent heat of vaporization
C.
Latent heat of fusion
D.
Heat capacity
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ANSWER :
B. Latent heat of vaporization