Sri Krishnadevaraya University 2009 B.Sc Physics Model - Question Paper
Sri Krishnadevaraya University
Model ques. Paper of B.Sc.Physics 2009
MODEL PAPER
II Year B.Sc Degree Examinations
PHYSICS Paper II Thermodynamics and Optics
[With Maths Combination]
[From 2009-2010]
Max marks :100 ] [ Time :3 Hours
Section A
Answer any four of the following : 4X15=60 Marks
- What are transport phenomena in gases? Derive an expression for the coefficient of viscosity of a gas on the basis of kinetic theory.
- Describe the working of Carnots engine and derive an expression for its efficiency.
Calculate the efficiency of a reversible engine that operates between the temperatures 200C and 120C?
- What is adiabatic demagnetization? How is this principle used in producing low
temperatures?
- Define Solar constant . Explain how it can be determined experimentally.
Calculate the surface area of tungsten filament of 100W electric bulb. The operating temperature of tungsten is 2450K and its emissivity is 0.3.
5. What is chromatic aberration? Derive the condition for achromatism when two
lenses are (a) in contact and (b)separated by a distance.
6. Describe the Newtons rings method for measuring the wavelength of
monochromatic light . Give necessary theory.
7. Explain, with necessary theory, how a plane diffraction grating is used in normal
incidence position to measure the wavelengths of spectral lines in mercury
spectrum.
A grating has 15 cms of the surface ruled with 6000 lines per cm.What is the
resolving power of the grating in the first order?
8. What are the important characteristics of laser radiation ? Explain the working
of He-Ne gas laser.
Section -B
Answer any five of the following : 5X8=40 Marks
9. Distinguish between average ,most probable and r.m.s. speeds of molecules in a gas.
10. Write a note on entropy and disorder.
11. State and explain Joule-Kelvin effect.
12. What is a black body? What are the salient features of black body radiation?
13. State Bose Einstien distribution law. Give its mathematical expression.
14. Deduce the system matrix for a thick lens.
15. Write a note on astigmatism.
16.What is meant by phase change on reflection?
17. Write a short note on law of Malus.
18. Describe the basic principle of holography.
PHYSICS
(With Mathematics Combination)
MODEL PAPER
SECTION A
(Essay type questions - 4 x 15 = 60)
1. Total Questions : 8 to be given out of 8 questions, 4 to be answered.
SECTION B
(short questions 5 x 8 = 40)
Two questions: 10 to be given out of 10 questions, 5 to be answered.
Note: Small problems may be added to two or three essay question.
Practicals scheme of valuation
1. Formula and explanation of symbols - (5 marks)
2. Tabular forms with circuit diagram wherever necessary - (5 marks)
3. Observations - (15 marks)
4. Calculations and graphs - (8 marks)
5. Result - (2 marks)
6. Viva-voce - (5 marks)
7. Practical Record - (10 marks)
Total Marks - (50 marks)
The copy is approved by Chairman and Members of BOS in (UG) Physics
on 20-6-2009
| Earning: Approval pending. |
