Thermodynamic and Statistical Physics (CSIR Physical Sciences): Questions 30 - 33 of 56

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Question number: 30

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2013

MCQ▾

Question

If the energy dispersion of a two – dimensional electron system is E=uk , where u is the velocity and k is the momentum, then the density of states D(E) depends on the energy as, (June)

Choices

Choice (4) Response
a.

E

b.

Constant

c.

1E

d.

E

Question number: 31

» Thermodynamic and Statistical Physics » Thermodynamic Potentials

Appeared in Year: 2014

MCQ▾

Question

A Carnot cycle operates as a heat engine between two bodies of equal heat capacity until their temperature become equal. If the initial temperature of the bodies are T1 and T2 , respectively, and T1>T2 , then their common final temperature is – (Dec– 2013)

Choices

Choice (4) Response
a.

12(T1+T2)

b.

T22T1

c.

T12T2

d.

T1T2

Question number: 32

» Thermodynamic and Statistical Physics » Random Walk

Appeared in Year: 2014

MCQ▾

Question

In one dimension, a random walker takes a step with equal probability to the left or right. What is the probability that the walker returns to the starting point after 4 steps? (June – 2014)

Choices

Choice (4) Response
a.

116

b.

38

c.

516

d.

14

Question number: 33

» Thermodynamic and Statistical Physics » Diffusion Equation

Appeared in Year: 2013

MCQ▾

Question

Consider the following ratio of the partial decay widest,

R1=Γ(ρ+π++π0)Γ(ρπ+π0)

R2=Γ(Δ++π++P)Γ(Δπ+n)

If the effects pf electromagnetic and weak interaction are neglected, then R1 and R2 are respectively is given as, (Dec -2013)

Choices

Choice (4) Response
a.

1and1

b.

1and2

c.

2and1

d.

1and2

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