# Thermodynamic and Statistical Physics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 21 - 24 of 64

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 463 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 300.00 or

## Question number: 21

» Thermodynamic and Statistical Physics » Classical and Quantum Statistics

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.

1

b.

c.

d.

## Question number: 22

» Thermodynamic and Statistical Physics » Introduction to Nonequilibrium Processes

Appeared in Year: 2014

MCQ▾

### Question

When a gas expands adiabatically from volume and by a quasi – static reversible process, it cools from temperature to . If now the same process is carried out adiabatically and irreversibly, and is the temperature of the gas when it has equilibrated, then – (December)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 23

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2011

MCQ▾

### Question

If the number density of a free electron gas in three electron gas in three dimensions is increase eight times, its Fermi temperature will –

(December)

### Choices

Choice (4) Response

a.

Increase by a factor of 4

b.

Decrease by a factor of 8

c.

Increase by a factor of 8

d.

Decrease by a factor of 4

## Question number: 24

» Thermodynamic and Statistical Physics » Laws of Thermodynamics

Appeared in Year: 2011

MCQ▾

### Question

The internal energy E of a system is given by, where b is a constant and other symbols have their usual meaning. The temperature of this system is equal to – (December)

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page