CSIR Physical Sciences: Questions 273 - 276 of 401

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Question number: 273

» Electromagnetic Theory » Reflection and Refraction

Appeared in Year: 2014

MCQ▾

Question

A beam of light of frequency ω is reflected from a dielectric – metal interface at normal incidence. The refractive index of the dielectric medium is n and that of the metal is n2=n(1+iρ) . If the beam is polarized parallel to the interface, then the phase change experienced by the light upon reflection is – (June – 2014)

Choices

Choice (4) Response

a.

tan1(2ρ)

b.

tan1(1ρ)

c.

tan(2ρ)

d.

tan1(2ρ)

Question number: 274

» Nuclear and Particle Physics » Binding Energy

Appeared in Year: 2013

MCQ▾

Question

The binding energy of a light nucleus (Z, A) in MeV is given by the approximate formula, B(A,Z)16A20A2334Z2A13+30(NZ)2A where N=AZ is the neutron number. The value of Z of the most stable isobar for a given A is – (June)

Choices

Choice (4) Response

a.

A2(1A23160)1

b.

A2(1+A4364)

c.

A2

d.

A2(1A23120)1

Question number: 275

» Classical Mechanics » Generalized Coordinates

Appeared in Year: 2013

MCQ▾

Question

The numbers of degrees of freedom of a rigid body in d space – dimension is – (June)

Choices

Choice (4) Response

a.

d!

b.

2d

c.

d(d+1)2

d.

6

Question number: 276

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

Appeared in Year: 2013

MCQ▾

Question

Let four point charges q,q2,qandq2 be placed at the vertices of a square of side a . Let another point charge q be placed at the centre of the square (see the figure)

4charges placed at the vertices of a square & 1 point at centre

4charges Placed at the Vertices of a Square & 1 Point at Centre

In figure four charges placed at the vertices of a square and one point charge is placed at the centre of the square.

Let V(r) be the electrostatic potential at a point P at a distance ra from the centre of the square. Then V(2r)V(r) is – (December – 2013)

Choices

Choice (4) Response

a.

18

b.

14

c.

1

d.

12

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