GATE (Graduate Aptitude Test in Engineering) Physics: Questions 15 - 17 of 622

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Question number: 15

» Thermodynamics and Statistical Physics » Free Energy

Appeared in Year: 2014

MCQ▾

Question

For a free electron gas in two dimensions, the variation of the density of state, Equation as a function of energy Equation , is best represented by –

Choices

Choice (4) Response

a.

The density of state as a function of E - Choice A

The Density of State as a Function of E - Choice A

In figure the variation of the density of state, N (E) as a function of energy E; is shown.

b.

The density of state as a function of E - Choice B

The Density of State as a Function of E - Choice B

In figure the variation of the density of state, N (E) as a function of energy E; is shown.

c.

The density of state as a function of E - Choice C

The Density of State as a Function of E - Choice C

In figure the variation of the density of state, N (E) as a function of energy E; is shown.

d.

The density of state as a function of E - Choice D

The Density of State as a Function of E - Choice D

In figure the variation of the density of state, N (E) as a function of energy E; is shown.

Question number: 16

» Electromagnetic Theory » Electromagnetic Waves and Their Reflection

Appeared in Year: 2015

MCQ▾

Question

A plane wave Equation after passing through an optical element emerges as Equation , where Equation and Equation are the wavevector and the angular frequency, respectively. The optical element is a –

Choices

Choice (4) Response

a.

Faraday rotator

b.

Polarizer

c.

Quarter wave plate

d.

Half wave plate

Question number: 17

» Thermodynamics and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2014

MCQ▾

Question

For a system of two bosons, each of which can occupy any of the two energy levels 0 and Equation , the mean energy of the system at a temperature Equation with Equation is given by,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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