CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 218 - 221 of 463

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Question number: 218

» Electromagnetic Theory » Scalar and Vector Potentials

Appeared in Year: 2013

MCQ▾

Question

The components of a vector potential are given by,

Where k is constant. The three components of the electric field are – (June – 2013)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 219

» Quantum Mechanics » Spin-Statistics Connection

Appeared in Year: 2013

MCQ▾

Question

Consider three particles A, B and C each with an attribute S that can take two values Let and at a given instant. In the next instant, each S value can change to with probability . The probability that remains unchanged is – (June – 2013)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 220

» Classical Mechanics » Conservation Laws and Cyclic Coordinates

Appeared in Year: 2012

MCQ▾

Question

A planet of mass m moves in the gravitational field of the Sun (mass M). If the semi – major and semi – minor axes of the orbit are and respectively, the angular momentum of the planet is – (December)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 221

» Atomic & Molecular Physics » Relativistic Corrections for Energy Levels of Hydrogen Atom

Appeared in Year: 2013

MCQ▾

Question

The energy of an electron in a band as a function of its wave vector is given by , where and are constants. The effective mass of the electron near the bottom of the band is – (Dec -2013)

Choices

Choice (4) Response

a.

b.

c.

d.

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