Thermodynamic and Statistical PhysicsClassical and Quantum Statistics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 3  5 of 5
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Question number: 3
» Thermodynamic and Statistical Physics » Classical and Quantum Statistics
Appeared in Year: 2011
Question
Consider a system of N non – interacting spins, each of which has classical magnetic moment of magnitude . The Hamiltonian of this system in an external magnetic field is
where is the magnetic moment of the spin. The magnetization per spin at temperature T is: (June)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 4
» Thermodynamic and Statistical Physics » Classical and Quantum Statistics
Appeared in Year: 2012
Question
The dispersion relation of phonons in a solid is given by . The velocity of the phonons at large wavelength is, (June)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 5
» Thermodynamic and Statistical Physics » Classical and Quantum Statistics
Appeared in Year: 2016
Question
Consider a gas of classical particles in a two – dimensional square box of side . If the total energy of the gas is , the entropy (apart from an additive constant) is: (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

