CONDENSED MATTER PHYSICS-III-2011

M.Sc. DEGREE EXAMINATION, APRIL/MAY 2011

Fourth Semester

Physics

Paper III – CONDENSED MATTER PHYSICS-III

Time: Three hours                                                                                               Maximum: 80 marks

Answer ALL questions.

All questions carry equal marks.

1.                 (a) Discuss different types of engineering materials based on their 

                   structure and bonding.

           (b) Discuss the properties of metal-polymer composites.

Or

            (c) Discuss the phase diagrams of a binary system of

                                    (i)  Complete solid solution.

                                    (ii)  Incomplete solid solution.

            (d) Discuss preparation and properties of metallic glasses.

2.                 (a) Explain what is transition. Briefly discuss the relevant theory.

            (b) Discuss the factors which affect glass transition temperature.

Or

            (c) Give example of glass forming systems and explain how the case of  

                   glass formation is determined.

            (d) Describe some interesting applications of glasses.

3.                 (a) When is a material called bio-compatible?

            (b) Discuss some important materials for bio-logical applications.

Or

            (c) Discuss the application of carbon and polymers as important materials.

            (d) Discuss what are soft tissue replacement implants and their advantages

                   and disadvantages.

4.                 (a) Discuss classification of liquid crystals based a molecular orientation.

            (b) Describe some applications of liquid crystals.

Or

            (c) Distinguish between quantum dots, quantum wines and quantum wells.

            (d) Discuss a few methods used for the preparation of nano-materials.

5.                 Write short notes on any TWO of the following:

a)    Different semi-conductor materials.

b)    Methods of preparation of glasses.

c)     Hydroxy apatite glass ceramics.

d)   Characterization methods for nano materials.

Intermediate 2011 physics second year question paper

PHYSICS, Paper - II
(English Version)
Time: 3 Hours Max. Marks: 60

SECTION-A
Note: i) Answer all questions. [2 x 10 = 20M]
ii) Each question carries two marks.
iii) All are very short answer type questions.

1. What are the Fraunhofer lines? State any two of their significances.

2. Mention any applications of diffraction?

3. Two magnetic poles of strength 40Am and 10Am are separated by a distance of 20cm in air. Find the force between them.

4. The potential of the earth is taken as zero. Explain.

5. On what factors does the resistance of a conductor depend?

6. What is a thermocouple? Write one of its uses.

7. How do you convert a moving coil galvanometer into a voltmeter?

8. What type of transformer is used in a bed lamp?

9. Define Modulation. Why is it necessary?

10. Draw the circuit symbols for p-n-p and n-p-n transistors.


SECTION-B
Note: i) Answer any six of the following questions. [6 x 4 = 24M]
ii) Each question carries four marks.
iii) All are short answer type questions.

11. Explain the construction and working of a Ramaden's eyepiece with a neat diagram.

12. State and explain the "Tangent Law" in magnetism.

13. Define intensity of electric field E and potential difference V. Derive the relationship between them.

14. Derive the balancing condition of a Wheatstone bridge.

15. Write short notes on the working principle of a thermopile?

16. Define the terms, work function and threshold frequency.

17. Write a short note on the discovery of a neutron.

18. What are n-type and p-type semiconductors? How is a semiconductor junction formed?

SECTION-C
Note: i) Answer any two of the following questions. [8 x 2 = 16M]
ii) Each question carries eight marks.
iii) All are long answer type questions.

19. State the laws of transverse vibrations in stretched strings. Describe and explain the experimental verification of the laws using a sonometer.
Problem:A wire length of 1m and mass 20kg is stretched with a force of 800N. Find its fundamental frequency.

20. Describe a tangent galvanometer with its necessary theory. Compare it with a moving coil galvanometer.

21. Explain the principle and working of a nuclear reactor with the help of a labeled diagram.
Problem:How much ²³5U is consumed in a day in an atomic power house operating at 400MW, provided that whole of the mass of the ²³5U is converted into energy?