Thermodynamic and Statistical Physics [CSIR (Council of Scientific & Industrial Research) Physical Sciences]: Questions 25 - 28 of 89

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Question 25

Appeared in Year: 2011

Question MCQ▾

A particle is confined to the region by a potential which increases linearly as . The mean position of the particle at temperature T is – (June)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 26

Appeared in Year: 2014

Question MCQ▾

A random walker takes a step of unit length in the positive direction with probability and a step of unit length in the negative direction with probability . The mean displacement of the walker after n steps is – (December)

Choices

Choice (4)Response

a.

b.

c.

0

d.

Edit

Question 27

Appeared in Year: 2011

Question MCQ▾

Consider the transition of liquid water to steam as water boils at a temperature of 1000 C under a pressure of 1 atmosphere. Which one of the following quantities does not change discontinuously at the transition? - (June)

Choices

Choice (4)Response

a.

The entropy

b.

The specific volume

c.

The Gibbs free energy

d.

The internal energy

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Question 28

Appeared in Year: 2011

Question MCQ▾

A system of N non – interacting spin particles is placed in external magnetic field H. The behaviour of the entropy of the system as a function of energy is given by – (December)

Choices

Choice (4)Response

a.

Entropy as a Function of Energy: Choice A

b.

Entropy as a Function of Energy: Choice B

c.

Entropy as a Function of Energy: Choice C

d.

Entropy as a Function of Energy: Choice D

Edit