Explore topic-wise MCQs in Thermodynamics.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

IF_U_IS_THE_ENERGY_DENSITY_THEN_PRESSURE(P)_EXERTED_BY_THE_BLACK-BODY_RADIATION_IN_AN_ENCLOSURE_IS?$

A. u/2
B. u/3
C. u/4
D. u
Answer» C. u/4
Discussion
2.

For a reversible isothermal change of volume, heat to be supplied reversibly to keep temperature constant is given by$

A. Q = (4/3)b*(T<sup>4</sup>)*(ΔV)
B. Q = (2/3)b*(T<sup>2</sup>)*(ΔV)
C. Q = (1/3)b*(T)*(ΔV)
D. none of the mentioned
Answer» B. Q = (2/3)b*(T<sup>2</sup>)*(‚âà√≠‚àö√ÜV)
Discussion
3.

The_Stefan-Boltzmann_law_is_given_by$

A. u = b*(T<sup>2</sup>)
B. u = b*(T<sup>3</sup>)
C. u = b*(T<sup>4</sup>)
D. u = b*T
Answer» D. u = b*T
Discussion
4.

If_the_temperature_is_half_the_original_temperature,_the_volume_of_black-body_radiation_is_to_be______adiabatically______times_its_original_volume_for_radiation_to_remain_at_equilibrium.

A. decreased, four
B. decreased, eight
C. increased, four
D. increased, eight
Answer» E.
Discussion
5.

If the temperature is constant, enthaply

A. changes with change in p
B. changes with change in V
C. changes with change in both p and V
D. does not change with change in p or V
Answer» E.
Discussion
6.

Thermal radiation in equilibrium with enclosing walls possesses an energy that depends on volume and temperature.

A. true
B. false
Answer» B. false
Discussion
7.

The equation dU=Cv*dT holds good for

A. any process for an ideal gas, even when the volume changes
B. for other substances it is true only when the volume is constant
C. both of the mentioned
D. none of the mentioned
Answer» D. none of the mentioned
Discussion
8.

If the temperature is constant, internal energy

A. changes with change in p
B. changes with change in V
C. changes with change in both p and V
D. does not change with change in p or V
Answer» E.
Discussion
9.

If temperature is constant, internal energy does not change.

A. true
B. false
Answer» B. false
Discussion
10.

The energy equation is given by

A. (∂U/∂V) = T*(∂p/∂T) + p
B. (∂U/∂V) = T*(∂p/∂T) – p
C. (∂U/∂V) = -T*(∂p/∂T) – p
D. (∂U/∂V) = p – T*(∂p/∂T)
Answer» C. (‚Äö√Ñ√∂‚àö‚Ć‚àö√°U/‚Äö√Ñ√∂‚àö‚Ć‚àö√°V) = -T*(‚Äö√Ñ√∂‚àö‚Ć‚àö√°p/‚Äö√Ñ√∂‚àö‚Ć‚àö√°T) ‚Äö√Ñ√∂‚àö√ë‚àö¬® p
Discussion
11.

For a system which undergoes an infinitesimal reversible process between two equilibrium states, the change in internal energy is

A. dU = pdV – TdS
B. dU = TdS + pdV
C. dU = TdS – pdV
D. dU = -TdS – pdV
Answer» D. dU = -TdS ‚Äö√Ñ√∂‚àö√ë‚àö¬® pdV
Discussion