CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 320 - 322 of 463

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Question number: 320

» Atomic & Molecular Physics » Diatomic Molecules » Vibrational

Appeared in Year: 2012

MCQ▾

Question

A system has two normal modes of vibration, with frequencies and . What is the probability that at temperature T, the system has an energy less than ?

[In the following and Z is the partition function of the system]

(June)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 321

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2012

MCQ▾

Question

The free energy difference between the superconducting and the normal states of a material is given by, where is an order parameter and and are constants such that in the normal and in the superconducting state, while always. The minimum value of is – (December)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 322

» Quantum Mechanics » Timeindependent Perturbation Theory and Applications

Appeared in Year: 2011

MCQ▾

Question

A constant perturbation as shown in the figure below acts on a particle of mass confined in an infinite potential well between 0 and L.

A constant perturbation is given

A Constant Perturbation Is Given

Above figure gives a constant perturbation acts on a particle confined in an infinite potential well between 0 and L.

The first – order correction to the ground state energy of the particle is –

Choices

Choice (4) Response

a.

b.

c.

d.

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