Thermodynamics and Statistical Physics (GATE (Graduate Aptitude Test in Engineering) Physics): Questions 1  4 of 82
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Question number: 1
» Thermodynamics and Statistical Physics » BlackBody Radiation and Planck's Distribution Law
Appeared in Year: 2016
Write in Short
The total power emitted by a spherical black body of radius at a temperature is . Let be the total power emitted by another spherical black body of radius kept at temperature . The ratio is . (Give your answer up to two decimal places)
Question number: 2
» Thermodynamics and Statistical Physics » Probability Ensembles
Appeared in Year: 2016
Write in Short
The entropy of a system of spins, which may align either in the upward or in the downward direction, is given by . Here, is the Boltzmann constant. The probability of alignment in the upward direction is . The value of , at which the entropy is maximum is (Give your answer up to one decimal place)
Question number: 3
» Thermodynamics and Statistical Physics » Macrostates and Microstates
Appeared in Year: 2015
Question
Consider a system of N non – interacting spin particles, each having a magnetic moment , is in a magnetic field . If is the total energy of the system, the number of accessible microstates is given by,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 4
» Thermodynamics and Statistical Physics » Free Energy
Appeared in Year: 2014
Question
For a free electron gas in two dimensions, the variation of the density of state, as a function of energy , is best represented by –
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
