# Thermodynamic and Statistical Physics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 33 - 36 of 64

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## Question number: 33

» Thermodynamic and Statistical Physics » Diffusion Equation

Appeared in Year: 2013

MCQ▾

### Question

Consider the following ratio of the partial decay widest,

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 34

» Thermodynamic and Statistical Physics » Ising Model

Appeared in Year: 2013

MCQ▾

### Question

Consider a system of two Ising spins and taking values with interaction energy given by , when it is in thermal equilibrium at temperature T. For large T, the average energy of the system varies as , with C given by,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 35

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2014

MCQ▾

### Question

The recently discovered Higgs boson at the LHC experiment has a decay mode into a photon and a Z boson. If the rest masses of the Higgs and Z boson are and respectively, and the decaying Higgs particle is at rest, the energy of photon will approximately be – (June – 2014)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 36

» 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.

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