Friday, July 29, 2016

NOU NOU B.Sc Physics Part I Paper II 2015 Question Paper

Nalanda Open University - Question Paper 2016
Annual Examination - 2015
B.Sc. Physics (Honours), Part-I
Time: 3.00 Hrs. Full Marks: 80
Answer any Five questions, selecting at least Two from each group. All questions carry equal marks.
Group - A
1. Deduce Maxwell’s law of velocity distribution amongst the molecules of an ideal gas. Use this law to find an expression for the most probable velocity.
2. Give the Einstein’s theory of Brownian motion.
3. Deduce an expression for steady state temperature distribution along a uniform metal rod heated at one end.
4. State the principle of equipartition of energy and derive the result that the mean energy of a system of gases is ½ kT per degree of freedom.
5. Use Debye’s theory to find the formula for specific heat of a solid.
Group – B
6. Derive the expression for efficiency of a carnot engine using the second law of thermodynamics. Define carnot’s refrigerator.
7. Derive Maxwell’s thermodynamic relations. On their basis solve at least two simple physical problems.
8. What is first order phase transition? Derive the Clausius-Clapeyron equation for these transitions. Also, explain triple point with the help of suitable diagram.
9. State and explain Joule-Thomson effect. What is the third law of thermodynamics?
10. Write brief notes on any Two of the following :
 (a) Reversible and irreversible processes.
 (b) Adiabatic and isothermal changes
 (c) Chemical potential
 (d) Thermodynamical probability
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