Thermodynamic and Statistical Physics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 41 - 44 of 64

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Question number: 41

» Thermodynamic and Statistical Physics » Bose-Einstein Condensation

Appeared in Year: 2012

MCQ▾

Question

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

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

Choices

Choice (4) Response

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d.

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.

b.

c.

0

d.

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 reversibly, by two paths, directly and 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 the work done by the gas is 100 J and the heat absorbed is . If during the process the work done by the gas is , the heat absorbed is – (December)

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Choice (4) Response

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c.

d.

Question number: 44

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2012

MCQ▾

Question

The free energy difference between the superconducting and the normal states of a material is given by, where is an order parameter and and are constants such that in the normal and in the superconducting state, while always. The minimum value of is – (December)

Choices

Choice (4) Response

a.

b.

c.

d.

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