Cochin University Previous Year Question Papers BE EE Electrical Material Science Nov 2011

Cochin University Previous Year Question Papers

BE EE Electrical Material Science Nov 2011

V Semester

 

Ee 504 Electrical Material Science

(2006 Scheme)

ART-A

(Answer ALL questions)

1. a)    Explain how the conductivity of conducting materials way with temperature and composition.

b)    With neat diagram, discuss about hysteresis curve.

c)     Explain the behaviour of dielectrics in alternating fields.

d)    Explain briefly the ageing of insulators.

e)    Explain about heat mirror coating.

f)      List out some alloys for switch contacts.

g)    What is photo electron spectroscopy? Explain.

h)    Explain briefly ferromagnetic resonance.

PART-B

2. Explain the Zone – refining technique for the preparation of semiconductor materials. Write notes on

(i)  ferro magnetism

(ii) organic semiconductor.

OR

3. Explain Fermi – Dirac distribution.

Write notes on:

(i)  hard and Soft magnetic materials’

(ii)  amorphous semiconductor

 

4. (a)Discuss the factors influencing dielectric strength.

(b) Discuss the electronic, ionic and dipolar polarizations of dielectrics.

OR

5. (a) What are the different types of insulating materials? Explain with examples.

(b) Explain the mechanism of breakdown in gases, liquids and solids.

Explain –

(i)   Solar selective coating

(ii)  Antireflection coating

(iii)  Cold minor coating.

OR

6. (a) Discuss about materials for

(i) Solar cells

(ii) Fuel cells

(iii) Battery.

 

7. (a) Explain optical microscopy.

(b) Discuss about the electron spin resonance.

OR

8.(a) Explain atomic absorption spectroscopy.

(b) Discuss about nuclear magnetic resonance.

Leave a Comment