C 1264
(Pages : 3) 0 0802(0

Time

: Three Hours

SIXTH SEMESTER (CUCBCSS—UG) DEGREE EXAMINATION
MARCH 2021

Physics/Applied Physics
PHY 6B 10/APY 6B 11—THERMAL AND STATISTICAL PHYSICS
Maximum : 80 Marks

Section A (Answer in a word or phrase)

Answer all questions.
Each question carries 1 mark.

Isothermal elasticity of a gas is its
(a) Pressure. (b) Volume.

{c) Entropy. (d) Temperature.

2. The slope of an adiabatic is —-——— than that of isothermal.

ಅ.೦. ಇ ರಾ. ೮ കം

10.

11.
: 12.

The area under the indicator diagram of a thermodynamic system represents pressure. (True or
False)

The entropy of a system ————— in an irreversible process.

In Carnot’s cycle, the first step is

Write down the FD distribution function.

What is Wiedmann Franz law ?

What is meant by thermodynamic equilibrium ?

What kinds of particles obey the Maxwell-Boltzmann statistics ?

What is an isobaric process ?
(10 x 1 = 10 marks)

Section B (Answer in a Short Paragraph- three or four sentences)

Answer at least six questions.

Each question carries 2 marks.

All questions can be attended.
Overall Ceiling 12.

How do you find the slope of an isotherm ?

State the first law of thermodynamics.

_Turn over