Thermodynamics and Statistical Physics [GATE (Graduate Aptitude Test in Engineering) Physics]: Questions 28 - 31 of 82

Access detailed explanations (illustrated with images and videos) to 659 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

How to register? Already Subscribed?

Question 28

Thermodynamics and Statistical Physics

Appeared in Year: 2011

Question

MCQ▾

A system has two energy levels with energies and . The lower level is fold degenerate while the upper level is doubly degenerate. If there are N non – interacting classical particles in the system, which is in thermodynamic equilibrium at temperature , the fraction of particles in the upper level is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 29

Thermodynamics and Statistical Physics

Appeared in Year: 2013

Question

MCQ▾

A proton is confined to a cubic box, whose sides have length . What is the minimum kinetic energy of the proton? The mass of proton is and Planck՚s constant is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 30

Thermodynamics and Statistical Physics

Appeared in Year: 2013

Question

MCQ▾

Across a first order phase transition, the free energy is –

Choices

Choice (4)Response

a.

Proportional to the temperature

b.

A continuous function of the temperature but its derivative is discontinuous

c.

Such that the first derivative with respect to temperature is continuous

d.

A discontinuous function of the temperature

Question 31

Thermodynamics and Statistical Physics

Appeared in Year: 2013

Question

MCQ▾

The entropy function of a system is given by , where and are positive constants. The temperature of the system is –

Choices

Choice (4)Response

a.

Negative for some energies

b.

Decreases monotonically with energy

c.

Zero

d.

Increases monotonically with energy

Developed by: