Thermodynamics and Statistical Physics (GATE (Graduate Aptitude Test in Engineering) Physics): Questions 8 - 12 of 82

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Question number: 8

» Thermodynamics and Statistical Physics » Classical and Aquantum Statistics

Appeared in Year: 2014

MCQ▾

Question

For a gas under isothermal conditions, its pressure P varies with volume V and . The bulk module B is proportional to –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 9

» Thermodynamics and Statistical Physics » Calculation of Thermodynemic Quantities

Appeared in Year: 2016

Short Answer Question▾

Write in Short

N atoms of an ideal gas are enclosed in a container of volume . The volume of the container is changed to , while keeping the total energy constant. The change in the entropy of the gas, in units of , is , where is the Boltzmann constant.

Question number: 10

» Thermodynamics and Statistical Physics » Degenerate Fermi Gas

Appeared in Year: 2015

Short Answer Question▾

Write in Short

Given that the Fermi energy of gold is , the number density of electrons is ________ (up to one decimal place)

(Mass of electron )

Question number: 11

» Thermodynamics and Statistical Physics » Free Energy

Appeared in Year: 2016

MCQ▾

Question

For a system at constant temperature and volume, which of the following statements is correct at equilibrium?

Choices

Choice (4) Response

a.

The Gibbs free energy attains a local minimum.

b.

The Helmholtz free energy attains a local minimum.

c.

The Helmholtz free energy attains a local maximum.

d.

The Gibbs free energy attains a local maximum.

Question number: 12

» Thermodynamics and Statistical Physics » Black-Body Radiation and Planck's Distribution Law

Appeared in Year: 2015

MCQ▾

Question

For a black body radiation in a cavity, photons are created and annihilated freely as a result of emission and absorption by the walls of the cavity. This is because –

Choices

Choice (4) Response

a.

Photons are spin – 1 particle

b.

The chemical potential of the photons is zero

c.

Photons obey Pauli exclusion principle

d.

The entropy of the photons is very large.

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