GATE Physics: Questions 81 - 84 of 622

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 622 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 350.00 or

Question number: 81

» Electromagnetic Theory » Energy and Momentum of Electromagnetic Waves

Appeared in Year: 2014

Short Answer Question▾

Write in Short

The intensity of a laser in free space is 150mWm2 . The corresponding amplitude of the electric field of the laser is _Vm . (ε0=8.854×1012C2Nm2)

Question number: 82

» Mathematical Physics » Vector Calculus

Appeared in Year: 2014

Short Answer Question▾

Write in Short

If the vector potential

A=αxx^+2yy^3zz^, satisfies the Coulomb gauge, the value of the constant α is ________.

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 12 particles of equal masses m , momenta p1 and p2 and position r1 and r2 be

H=12mp12+12mp22+12mω2(r12+r22)+kσ1σ2

where σ1 and σ2 denote the corresponding Pauli matrices, ω=0.1eV and k=0.2eV . If the ground state has net spin zero, then the energy (in eV ) 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.

f Page
Sign In