M.Sc. DEGREE EXAMINATION, NOVEMBER 2017.
Third Semester
Physics (Spl. in Biosensor)
CONDENSED MATTER PHYSICS
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Write down the various symmetry elements in crystalline
solids.
2. Explain group velocity with an example.
3. Define unit cell.
4. What is symmetry?
5. What are the normal modes of vibrations?
6. What is polarization?
7. What is meant by band gap?
8. Define photons.
9. State Hund's rule for the ground state.
10. Define superconductivity.
Sub. Code
522301
RW-940
2
Ws20
Part B x 5 25)
Answer all questions, choosing either or
11. Draw reciprocal lattice to BCC structure and write
the primitive translation vector condition.
Or
Draw reciprocal lattice to FCC structure and write
the primitive translation vector condition.
12. Write in detail about Hall effect.
Or
Distinguish between super conductor and
conductor.
13. Explain the pyro and ferro eletric properties of
crystals.
Or
Write the local electric field and polarization field.
14. Describe the classical theory of specific heat. What
are its limitations?
Or
Briefly explain about hysteresis loop.
15. Describe the London equations.
Or
Explain the meissner effect with an example.
RW-940
3
Ws20
Part C x 10 30)
Answer any three questions.
16. Explain the different types of bonding in crystals with
neat diagrams.
17. Write in detail about Krongi-Penny model.
18. Explain the polarization field and Lorentz field.
19. Write the difference between soft and hard materials
magnetic.
20. Describe the application of superconductors.
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