Thermodynamic and Statistical Physics (CSIR Physical Sciences): Questions 41 - 43 of 56

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: 41

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2012

MCQ▾

Question

Bose condensation occurs in liquid He4 kept at ambient pressure at 2.17K . At which temperature will Bose condensation occur in He4 in gaseous state, the density of which is 1000 times smaller than that of liquid He4 ?

(Assume that it is a perfect Bose gas) (June)

Choices

Choice (4) Response
a.

21.7μk

b.

2.17μk

c.

21.7mk

d.

2.17mk

Question number: 42

» 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: 43

» Thermodynamic and Statistical Physics » Laws of Thermodynamics

Appeared in Year: 2012

MCQ▾

Question

A given quantity of gas is taken from the state AC reversibly, by two paths, AC directly and ABC as shown in the figure below.

PV diagram of cycle ABC

PV Diagram of Cycle ABC

In PV diagram of ABC cycle is shown.

During the process AC the work done by the gas is 100 J and the heat absorbed is 150J . If during the process ABC the work done by the gas is 30J , the heat absorbed is – (December)

Choices

Choice (4) Response
a.

20J

b.

280J

c.

220J

d.

80J

Sign In