CSIR Physical Sciences: Questions 305 - 308 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: 305

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2012

MCQ▾

Question

Non – interacting boson undergo Bose – Einstein Condensation (BEC) when trapped in a three – dimensional isotropic simple harmonic potential. For BEC to occur, the chemical potential must be equal to –

(December)

Choices

Choice (4) Response

a.

3ω2

b.

ω2

c.

0

d.

ω

Question number: 306

» Classical Mechanics » Poisson Brackets

Appeared in Year: 2012

MCQ▾

Question

The Poisson bracket { r , p } has the value – (June)

Choices

Choice (4) Response

a.

3

b.

1

c.

r^p^

d.

r p

Question number: 307

» Condensed Matter Physics » Elastic Properties

Appeared in Year: 2012

MCQ▾

Question

A resistance strain gauge is fastened to a steel fixture and subjected to a stress of 1000kgm2 . If the gauge factor is 3 and the modulus of elasticity of steel is 2×1010kgm2 , then the fractional change in resistance of the strain gauge due to the applied stress is –

(Note: The gauge factor is defined as the ratio of the fractional change in resistance to the fractional change in length. ) (June)

Choices

Choice (4) Response

a.

0.16×1010

b.

1.5×107

c.

0.5×107

d.

3.0×10

Question number: 308

» Nuclear and Particle Physics » Application of Symmetry Arguments to Particle Reactions

Appeared in Year: 2012

MCQ▾

Question

The muon has mass 105MeVc2 and mean lifetime 2.2μs in its rest frame. The mean distance traversed by muon of energy 315MeVc2 before decaying is approximately – (December)

Choices

Choice (4) Response

a.

6.6μm

b.

3×105km

c.

2.2cm

d.

1.98km

Sign In