GATE (Graduate Aptitude Test in Engineering) Physics: Questions 127  129 of 659
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Question number: 127
» Thermodynamics and Statistical Physics » Degenerate Fermi Gas
Appeared in Year: 2012
Question
For an ideal Fermi gas in three dimensions, the electron velocity at the Fermi surface is related to electron concentration as,
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Question number: 128
» Thermodynamics and Statistical Physics » Partition Function
Appeared in Year: 2012
Question
A paramagnetic system consisting of N spin – half particles, is placed in an external magnetic field. It is found that spins are aligned parallel and the remaining spins aligned antiparallel to the magnetic field. The statistic entropy of the system is –
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Question number: 129
» Thermodynamics and Statistical Physics » Calculation of Thermodynemic Quantities
Appeared in Year: 2012
Question
Inverse susceptibility as a function of temperature, for a material undergoing paramagnetic to ferromagnetic transition is given in the figure, where is the origin. The values of the Curie constant, , and the Weiss molecular field constant, , in CGS units, are –
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