# Thermodynamic and Statistical Physics-Planck's Distribution Law (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 1 - 4 of 4

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: 1

» Thermodynamic and Statistical Physics » Planck's Distribution Law

Appeared in Year: 2013

MCQ▾

### Question

The speed of the molecules of mass m of an ideal gas obeys Maxwell’s velocity distribution law at an equilibrium temperature T. Let denote the components of the velocity and the Boltzmann constant. The average value of where and are constant, is – (December)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 2

» Thermodynamic and Statistical Physics » Planck's Distribution Law

Appeared in Year: 2014

MCQ▾

### Question

A system can have three energy levels: . The level is doubly degenerate, while the others are non-degenerate. The average energy at inverse temperature is – (June)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 3

» Thermodynamic and Statistical Physics » Planck's Distribution Law

MCQ▾

### Question

In low density oxygen gas at low temperature, only the translational and rotational modes of the molecules are excited. The specific heat per molecule of the gas is – (December)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 4

» Thermodynamic and Statistical Physics » Planck's Distribution Law

Appeared in Year: 2013

MCQ▾

### Question

Let be a random variable uniformly distributed in the interval and , where is a real constant. If V is to be exponentially distributed in the interval with unit standard deviation, then the value of should be – (June)

### Choices

Choice (4) Response

a.

b.

-1

c.

1

d.

f Page