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
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
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 » BoseEinstein Condensation
Appeared in Year: 2014
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
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. 

