Solid State Physics [GATE (Graduate Aptitude Test in Engineering) Physics]: Questions 42 - 45 of 68

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Question 42

Appeared in Year: 2007

Question

MCQ▾

A ferromagnetic mixture of iron and copper having atoms of exhibits a saturation magnetization of . Assume that the total number of atoms per unit volume is . The magnetic moment of an iron atom, in terms of the Bohr Magneton, is –

Choices

Choice (4)Response

a.

2.3

b.

1.7

c.

3.8

d.

2.9

Question 43

Appeared in Year: 2008

Question

MCQ▾

An intrinsic semiconductor with mass of a hole and mass of an electron is at a finite temperature . If the top of the valence band energy is and the bottom of the conduction band energy is , the Fermi energy of the semiconductor is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 44

Appeared in Year: 2008

Question

MCQ▾

The structure factor of a single cell of identical atoms of form factor is given by ; where is the coordinate of an atom, and are the Miller indices. Which one of the following statement is correct for the diffraction peaks of body centered cubic and face centered cubic lattices?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 45

Appeared in Year: 2008

Question

MCQ▾

The plot of inverse magnetic susceptibility versus temperature of an anti – ferromagnetic sample corresponds to –

Choices

Choice (4)Response

a.

Plot of Inverse Magnetic Susceptibility vs Temperature: Choice A

b.

Plot of Inverse Magnetic Susceptibility vs Temperature: Choice B

c.

Plot of Inverse Magnetic Susceptibility vs Temperature: Choice C

d.

Lot of Inverse Magnetic Susceptibility vs Temperature: Choice D

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