Thermodynamics AFCAT Questions

AFCAT Physics

Thermodynamics MCQ Questions


13.
The Zeroth Law leads directly to the concept of:
A.
Specific heat
B.
Entropy
C.
Temperature
D.
Internal energy
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ANSWER :
C. Temperature
14.
Heat flows spontaneously from:
A.
A body of higher pressure to a body of lower pressure
B.
A body of higher density to a body of lower density
C.
A body of larger mass to a body of smaller mass
D.
A body at higher temperature to a body at lower temperature
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ANSWER :
D. A body at higher temperature to a body at lower temperature
15.
Internal energy U of a system is:
A.
The sum of kinetic and potential energies of all molecules in the rest frame of the system
B.
The kinetic energy of the system as a whole
C.
The work done by the system on surroundings
D.
Only the potential energy of molecules
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ANSWER :
A. The sum of kinetic and potential energies of all molecules in the rest frame of the system
16.
Internal energy U of an ideal gas depends on:
A.
Both pressure and volume independently
B.
Temperature only
C.
Volume only
D.
Pressure only
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ANSWER :
B. Temperature only
17.
Internal energy is a:
A.
Path variable — depends on how the state was achieved
B.
Quantity that depends only on the volume
C.
Quantity that depends on the surroundings
D.
State variable — depends only on the state, not on the path
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ANSWER :
D. State variable — depends only on the state, not on the path
18.
Which of the following is NOT a thermodynamic state variable?
A.
Pressure (P)
B.
Internal energy (U)
C.
Heat (Q)
D.
Volume (V)
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ANSWER :
C. Heat (Q)