CSIR Physical Sciences: Questions 284  287 of 389
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Question number: 284
» Thermodynamic and Statistical Physics » Ferromagnetism
Appeared in Year: 2012
Question
The magnetization M of a ferromagnet, as a function of the temperature T and the magnetic field H, is described by the equation . In these units, the zero – field magnetic susceptibility in terms of is given by, (June)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 285
» Condensed Matter Physics » Bonding of Solids
Appeared in Year: 2012
Question
The radius of the Fermi sphere of free electrons in a monovalent metal with an structure, in which the volume of the unit cell is is –
(December)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 286
» Atomic & Molecular Physics » LS & JJ Couplings
Appeared in Year: 2012
Question
The spin orbit interaction in an atom is given by where L and S denote the orbital and spin angular momenta, respectively of the electron. The splitting between the levels and is – (June)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 287
» Condensed Matter Physics » Band Theory of Solids » Semiconductors
Appeared in Year: 2012
Question
In a band structure calculation, the dispersion for electrons is found to be, Where is a constant and is the lattice constant. The effective mass at the boundary of the first Brillouin zone is – (December)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
