CSIR Physical Sciences: Questions 345 - 348 of 401

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Question number: 345

» Classical Mechanics » Rigid Body Dynamics - Moment of Inertia Tensor

Appeared in Year: 2011

MCQ▾

Question

An annulus of mass M made of a material of uniform density has inner and outer radii ‘a’ and ‘b’ respectively. Its principal moment of inertia along the axis of symmetry perpendicular to the plane of the annulus is: (December)

Choices

Choice (4) Response

a.

12M(b2a2)

b.

12Mπ(b2a2)

c.

12Mb4+a2b2a2

d.

12M(b2+a2)

Question number: 346

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

Appeared in Year: 2011

MCQ▾

Question

The ratio of intensities of the D1 and D2 lines of sodium at high temperature – (December)

Choices

Choice (4) Response

a.

2:3

b.

1:1

c.

1:2

d.

1:3

Question number: 347

» Classical Mechanics » Special Theory of Relativity » Mass-Energy Equivalence

Appeared in Year: 2011

MCQ▾

Question

The minimum energy of an electron (the rest mass of which is 0.5 MeV) that can emit Cerenkov radiation while passing through water (of refractive index 1.5) is approximately – (December)

Choices

Choice (4) Response

a.

1.0MeV

b.

0.5MeV

c.

3.0MeV

d.

0.6MeV

Question number: 348

» Classical Mechanics » Symmetry

MCQ▾

Question

The character table of C3V , the group of symmetries of an equilateral triangle is given below,

Table for character of C3v

In above table character table of C3v, the group of symmetries of an equilateral triangle is given.

χ(0)

χ(1)

χ(2)

1C1

1

1

b

3C2

1

a

c

2C3

1

1

d

In the above C1,C2,C3 denotes the three classes of C3V , containing 1, 3 and 2 elements respectively, and χ(0),χ(1)andχ(2) are the characters of the three irreducible representations Γ(0),Γ(1) and Γ(2) of C3V . The entries a,b,c and d in this table are, respectively –

Choices

Choice (4) Response

a.

2, 1,1, 0

b.

1, 1,1,1

c.

1, 2,0,1

d.

1, 1,0,1

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