M.Sc. DEGREE EXAMINATION, APRIL 2016
Fourth Semester
Physics
CONDENSED MATTER PHYSICS
(2011 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 2 20)
Answer all questions.
1. Define the primitive cell.
2. Draw a diagram for FCC lattice.
3. What are phonons?
4. Define Fermi energy.
5. What is a dielectric material?
6. List the different polarizabilities.
7. Classify the magnetic materials.
8. Illustrate a spin wave with a diagram.
9. Define superconductivity.
10. Mention the formation of Cooper pairs.
Sub. Code
521401
RW-10848
2
Wk ser
Part B 5 25)
Answer all questions, choosing either or
11. Explain the symmetry operations in crystals.
Or
Find the Miller indices of a plane whose intercepts
along the X,Y and Z axes are 2,4 and 6.
12. Derive the dispersion relation for a monoatomic
lattice.
Or
Explain the Hall effect with a suitable diagram.
13. Discuss about the local electric field present in a
dielectric.
Or
Explain the piezoelectricity with an example.
14. Discuss the Langevin's theory of paramagnetism.
Or
How are the hard and soft magnetic materials
classified?
15. Distinguish between the type I and type II
superconductors.
Or
Write a note on high temperature superconductors.
RW-10848
3
Wk ser
Part C 10 30)
Answer any three questions.
16. Draw the fourteen Bravais lattices in three dimension.
17. Explain Kronig-Penny model on the basis of the band
theory of solids.
18. Describe the types of polarizabilities present in a
dielectric.
19. Derive the dispersion relation for ferromagnetic magnons.
20. Discuss the D.C. Josephson tunneling effect.