Thermodynamic and Statistical Physics (CSIR Physical Sciences): Questions 47 - 49 of 56

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Question number: 47

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2011

MCQ▾

Question

Assume that the free energy of a magnetic system has an expansion in the order parameter M of the form Equation , with Equation . As the temperature is lowered below Equation , the system undergoes a phase transition. The behaviour of the order parameter just below the transition, where Equation is very small, is best described by – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 48

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2011

MCQ▾

Question

Consider an ideal Bose gas in three dimensions with the energy – momentum relation Equation with Equation . The range of Equation for which this system may undergo a Bose – Einstein condensation at a non- zero temperature is – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 49

» Thermodynamic and Statistical Physics » Brownian Motion

Appeared in Year: 2011

MCQ▾

Question

A gas of N non- interacting particles is in thermal equilibrium at temperature T. Each particle can be in any of the possible non – degenerate state of energy Equation . The average energy per particle of the gas, when Equation , is – (December)

Choices

Choice (4) Response

a.

ε

b.

Equation

c.

Equation

d.

Equation

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