Solid State Physics [GATE (Graduate Aptitude Test in Engineering) Physics (PE)]: Questions 1 - 4 of 140

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Question 1

Appeared in Year: 2012

Question MCQ▾

The experimentally measured transmission spectra of metal, insulator and semiconductor thin films are shows in the figure. It can be inferred that I, II and III correspond respectively, to – (June)

Plot of Transmission Spectra V/S Wavelength

Choices

Choice (4)Response

a.

Metal, semiconductor and insulator

b.

Semiconductor, metal and insulator

c.

Insulator, semiconductor and metal

d.

Insulator, metal and semiconductor

Edit

Question 2

Appeared in Year: 2014

Question MCQ▾

The dispersion relation for electron in an f. c. c. crystal is given, in the tight binding approximation, by ; where a is the lattice constant and is a constant with the dimension of energy. The x – component of the velocity of the electrons at is – (June – 2014)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 3

Appeared in Year: 2013

Question MCQ▾

Consider a system of two Ising spins and taking values with interaction energy given by , when it is in thermal equilibrium at temperature T. For large T, the average energy of the system varies as , with C given by,

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 4

Appeared in Year: 2014

Question MCQ▾

Consider an electron in a b. c. c. lattice with lattice constant . A single particle wavefunction that satisfies the Bloch theorem will have the form , with being – (June – 2014)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit