CSIR Physical Sciences: Questions 68 - 71 of 389

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 389 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 250.00 or

Question number: 68

» Thermodynamic and Statistical Physics » Micro- and Macro-States

Appeared in Year: 2012

MCQ▾

Question

Consider a system of non – interacting particle in d dimensions obeying the dispersion relation ε=AkS, where ε is the energy, k is wavevector, s is an integer and A a constant. The density of states, N(ε), is proportional to – (June)

Choices

Choice (4) Response

a.

εds1

b.

εds+1

c.

εsd+1

d.

εsd1

Question number: 69

» Quantum Mechanics » Spin-Statistics Connection

Appeared in Year: 2013

MCQ▾

Question

A spin 12 particle is in the state χ=111(1+i3) in the eigen basis S2 and Sz . If we measure Sz , the probabilities of getting +2 and 2 , respectively, are (December)

Choices

Choice (4) Response

a.

0 and 1

b.

211and911

c.

12and12

d.

111and311

Question number: 70

» Electronics and Experimental Methods » Operational Amplifiers

Appeared in Year: 2014

MCQ▾

Question

An op-amp based voltage follower – (June)

Choices

Choice (4) Response

a.

Is useful for converting a high impedance source into a low impedance source

b.

Has infinitely high closed loop gain.

c.

Is useful for converting a low impedance source into a high impedance source.

d.

Has infinitely high closed loop output impedance.

Question number: 71

» Electromagnetic Theory » Electrostatics: Gauss's Law and Its Applications

Appeared in Year: 2014

MCQ▾

Question

Consider an electromagnetic wave at the interface between two homogeneous dielectric media of dielectric constant ε1 and ε2 . Assuming ε2>ε1 and no charge on the surface, the electric field vector E and the displacement vector D in the two media satisfy the following inequalities – (June)

Choices

Choice (4) Response

a.

E2 < E1 and D2 < D1

b.

E2 < E1 and D2 > D1

c.

E2 > E1 and D2 > D1

d.

E2 > E1 and D2 < D1

Sign In