Thermodynamic and Statistical Physics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 30  33 of 56
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Question number: 30
» Thermodynamic and Statistical Physics » Free Energy
Appeared in Year: 2013
Question
If the energy dispersion of a two – dimensional electron system is , where is the velocity and k is the momentum, then the density of states depends on the energy as, (June)
Choices
Choice (4)  Response  

a. 


b.  Constant 

c. 


d.  E 

Question number: 31
» Thermodynamic and Statistical Physics » Thermodynamic Potentials
Appeared in Year: 2014
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 and , respectively, and , then their common final temperature is – (Dec– 2013)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 32
» Thermodynamic and Statistical Physics » Random Walk
Appeared in Year: 2014
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. 


b. 


c. 


d. 


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. 

