GATE (Graduate Aptitude Test in Engineering) Physics: Questions 6  8 of 622
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Question number: 6
» 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: 7
» Classical Mechanics » Conservation Laws
Appeared in Year: 2014
Question
The recoil momentum of an atom is when it emits an infrared photon of wavelength , and it is when it emits a photon of visible wavelength . The ratio is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 8
» 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. 

