GATE Physics: Questions 83 - 84 of 622

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Question number: 83

» Quantum Mechanics » Angular Momentum and Spin

Appeared in Year: 2015

Short Answer Question▾

Write in Short

Let the Hamiltonian for two spin Equation particles of equal masses Equation , momenta Equation and Equation and position Equation and Equation be

Equation

where Equation and Equation denote the corresponding Pauli matrices, Equation and Equation . If the ground state has net spin zero, then the energy (in Equation ) is ________.

Question number: 84

» 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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