Thermodynamic and Statistical Physics [CSIR (Council of Scientific & Industrial Research) Physical Sciences]: Questions 33 - 36 of 89

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Question 33

Appeared in Year: 2013

Question MCQ▾

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.

Edit

Question 34

Appeared in Year: 2013

Question MCQ▾

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.

Edit

Question 35

Appeared in Year: 2014

Question MCQ▾

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.

Edit

Question 36

Appeared in Year: 2013

Question MCQ▾

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.

-1

b.

1

c.

d.

Edit