CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 284 - 287 of 463

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Question number: 284

» Thermodynamic and Statistical Physics » Ferromagnetism

Appeared in Year: 2012

MCQ▾

Question

The magnetization M of a ferro-magnet, as a function of the temperature T and the magnetic field H, is described by the equation Equation . In these units, the zero – field magnetic susceptibility in terms of Equation is given by, (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 285

» Condensed Matter Physics » Bonding of Solids

Appeared in Year: 2012

MCQ▾

Question

The radius of the Fermi sphere of free electrons in a monovalent metal with an Equation structure, in which the volume of the unit cell is Equation is –

(December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 286

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2012

MCQ▾

Question

The spin orbit interaction in an atom is given by Equation where L and S denote the orbital and spin angular momenta, respectively of the electron. The splitting between the levels Equation and Equation is – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 287

» Condensed Matter Physics » Band Theory of Solids » Semiconductors

Appeared in Year: 2012

MCQ▾

Question

In a band structure calculation, the dispersion for electrons is found to be, Equation Where Equation is a constant and Equation is the lattice constant. The effective mass at the boundary of the first Brillouin zone is – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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