CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 281 - 283 of 463

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Question number: 281

» Quantum Mechanics » Motion in Central Potential » Addition of Angular Momenta

Appeared in Year: 2013

MCQ▾

Question

The expectation value of the x – component of the orbital angular momentum Equation in the state, Equation

(Where Equation are the eigenfunction in usual notation), is – (December -2013)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

0

d.

Equation

Question number: 282

» Classical Mechanics » Phase Space Dynamics

Appeared in Year: 2012

MCQ▾

Question

Consider the motion of a classical particle in a one – dimensional double – well potential Equation . If the particle is displaced infinitesimally from the minimum on the positive x – axis (and friction is neglected), then – (June)

Choices

Choice (4) Response

a.

The particle will execute simple harmonic motion in the right well an angular frequency Equation

b.

The particle will approach the bottom of the right well and settle there

c.

The particle will switch between the right and left wells

d.

The particle will execute simple harmonic motion in the right well an angular frequency Equation

Question number: 283

» Condensed Matter Physics » Hall Effect and Thermoelectric Power

Appeared in Year: 2012

MCQ▾

Question

A magnetic field sensor based on the Hall effect is to be fabricated by implanting As into a Si film of thickness Equation . The specifications require a magnetic field sensitivity of Equation at an excitation current of Equation . The implantation dose is to be adjusted such that the average carrier density, after activation, is – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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