CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 363 - 365 of 463

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Question number: 363

» Thermodynamic and Statistical Physics » Ising Model

Appeared in Year: 2011

MCQ▾

Question

A one – dimensional chain consists of a set of N rods each of length Equation . When stretched by a load, each rod can align either parallel or perpendicular to the length of the chain. The energy of a rod is Equation when aligned parallel to the length of the chain and is Equation when perpendicular to it. When the chain is in thermal equilibrium at temperature T, its average length is – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 364

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2011

MCQ▾

Question

The excitations of a three – dimensional solid are bosonic in nature with their frequency Equation and wave – number k are related by Equation in the large wavelength limit. If the chemical potential is zero, the behaviour of the specific heat of the system at low temperature is temperature is proportional to – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

T

d.

Equation

Question number: 365

» Quantum Mechanics » Motion in Central Potential » Hydrogen Atom

Appeared in Year: 2011

MCQ▾

Question

A particle in one dimension moves under the influence of a potential Equation , where Equation is a real constant. For large Equation the quantized energy level Equation depends on Equation as: (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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