ANDHRA UNIVERSITY
B.Sc. DEGREE EXAMINATION
(Examination at the end of Semester - VI)
Part II:PHYSICS
Material Science
Time : 3 Hours] [Max : 75 Marks
Section - A (5x 5=25 Marks)
Answer any Five from the following Eight questions.
1. Distinguish between bulk and nanomaterials.
2. Write about metals and alloys.
3. Define creep. How the creep decides ductility of a metal?
4. Write the Fick's law of diffusion. :
5. Explain the deformation of the metal.
6. Write the classical Langevin theory of diamagnetism.
7. Discuss the factors affecting polarization.
8. Write the mechanism of polarization in dielectrics.
Section - B (5 x 10 = 50 Marks)
Answer All Questions.
9. (a) Define binding energy. Derive the expression for binding energy in ionic crystals.
Or
(b) Discuss covalent bond; metallic bond, dipole bond and hydrogen bond with examples.
10. (a) Explain point defects, line defect surface defects, and volume defects.
Or
(b) How the ‘defects can be produced and removed in materials?
11. (a) Write the technological properties of materials.
Or
(b) Write’the metal forming process.
12. (a) Discuss Weiss theory of ferromagnetism.
Or
(b) Write about dia, para, Ferri and ferromagnetic materials.
13. (a) Draw the E versus P diagram in dielectrics and explain coercivity and remanent polarization.
Or
(b) Write the applications of ferroelectrics and piezoelectrics.
