Solid State Physics (GATE Physics): Questions 1 - 4 of 65

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Question number: 1

» Solid State Physics » Nearly Free Electron and Tight Binding Models

Appeared in Year: 2016

MCQ▾

Question

Consider a metal which obeys the Sommerfeld model exactly. If Equation is the Fermi energy of the metal at Equation and Equation is its Hall coefficient, which of the following statement is correct?

Choices

Choice (4) Response

a.

Equation is independent of Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 2

» Solid State Physics » Elements of Crystallography

Appeared in Year: 2015

Short Answer Question▾

Write in Short

The lattice parameters Equation of an orthorhombic crystal are related by Equation . In units of Equation , the inter-planar separation between the Equation planes is ________ (up to three decimal places)

Question number: 3

» Solid State Physics » Lattice Vibrations and Thermal Properties of Solid

Appeared in Year: 2015

Short Answer Question▾

Write in Short

The dispersion relation for phonons in a one dimensional monatomic Bravais lattice with lattice spacing Equation and consisting of ions of masses M is given by,

Equation

Where Equation is the frequency of oscillation, Equation is the wavevector and C is the spring constant. For the long wavelength modes Equation , the ratio of the phase velocity to the group velocity is ________.

Question number: 4

» Solid State Physics » Elements of Superconductivity » Type-I and Type-II Superconductors

Appeared in Year: 2015

MCQ▾

Question

Which one of the following represents the electron occupancy for a superconductor in its normal and superconducting states?

Choices

Choice (4) Response

a.

The electron occupancy: Choice A

The Electron Occupancy: Choice A

In figure the electron occupancy for normal state and superconducting state are given by graphs.

b.

The electron occupancy: Choice B

The Electron Occupancy: Choice B

In figure the electron occupancy for normal state and superconducting state are given by graphs.

c.

The electron occupancy: Choice C

The Electron Occupancy: Choice C

In figure the electron occupancy for normal state and superconducting state are given by graphs.

d.

The electron occupancy: Choice D

The Electron Occupancy: Choice D

In figure the electron occupancy for normal state and superconducting state are given by graphs.

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