# Thermodynamic and Statistical Physics-Classical and Quantum Statistics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 1 - 4 of 5

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## Question number: 1

» Thermodynamic and Statistical Physics » Classical and Quantum Statistics

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Appeared in Year: 2013

MCQ▾

### Question

For temperature T1 > T2, the qualitative temperature dependence of the probability distribution of the speed of molecule in three dimensions is correctly represented by the following figure: (June)

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 2

» Thermodynamic and Statistical Physics » Classical and Quantum Statistics

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Appeared in Year: 2014

MCQ▾

### Question

Let ; where and are independent and identically distributed Gaussian random variables of mean and standard deviation . Then is – (June)

### Choices

Choice (4)Response

a.

b.

c.

1

d.

## Question number: 3

» Thermodynamic and Statistical Physics » Classical and Quantum Statistics

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Appeared in Year: 2011

MCQ▾

### Question

Consider a system of N non – interacting spins, each of which has classical magnetic moment of magnitude . The Hamiltonian of this system in an external magnetic field is

where is the magnetic moment of the spin. The magnetization per spin at temperature T is: (June)

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 4

» Thermodynamic and Statistical Physics » Classical and Quantum Statistics

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Appeared in Year: 2012

MCQ▾

### Question

The dispersion relation of phonons in a solid is given by . The velocity of the phonons at large wavelength is, (June)

### Choices

Choice (4)Response

a.

b.

c.

d.

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