CSIR Physical Sciences: Questions 99 - 102 of 401

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Question number: 99

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2013

MCQ▾

Question

Consider the melting transition of ice into water at constant pressure. Which of the following thermodynamic quantities does not exhibit a discontinuous change across the phase transition? (December)

Choices

Choice (4) Response

a.

Internal energy

b.

Entropy

c.

Helmholtz free energy

d.

Gibbs free energy

Question number: 100

» Thermodynamic and Statistical Physics » Micro- and Macro-States

Appeared in Year: 2012

MCQ▾

Question

The number of ways in which N identical bosons can be distributed in two energy levels, is – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

N

Question number: 101

» Classical Mechanics » Periodic Motion » Small Oscillations

Appeared in Year: 2012

MCQ▾

Question

A solid cylinder of height H, radius R and density Equation , floats vertically on the surface of a liquid of density Equation . The cylinder will be set into oscillatory motion when a small instantaneous downward force is applied. The frequency of oscillation is – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 102

» Quantum Mechanics » Spin-Statistics Connection

Appeared in Year: 2012

MCQ▾

Question

Consider a system of three spins S1, S2 and S3 each of which can take values + 1 and –1. The energy of the system is given by Equation , where J is a positive constant. The minimum energy and the corresponding number of spin configurations are, respectively – (December)

Choices

Choice (4) Response

a.

–3J and 2

b.

– 3J and 1

c.

J and 1

d.

– 6J and 2

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