D D1054 Pages: 2

Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), MAY 2019
Course Code: EE206
Course Name: MATERIAL SCIENCE (EE)

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks
1 Define polarization and what are different polarization processes? (5)
2 Explain the properties of Mica and Ceramics. (5)
3 List any five characteristics of 57%. (5)
4 Explain Curie Wiess law. (5)
5 Explain superconductivity and its applications. (5)
6 What are the materials used for solar cells? Explain. (5)
7 Write short notes on bio materials. (5)
8 What is photoelectron spectroscopy? Explain. (5)
PART 13
Answer any two questions, each carries 10 marks
9 2) Derive Claussius-mosotti relation. (5)
b) What are compound semiconductors? (5)
10 a) Differentiate organic and inorganic insulators. (4)
b) Why 516 gas is used in circuit breakers? (3)
c) What are the insulating materials used in capacitor materials? (3)
11 a) Explain different types of polarizations in dielectrics. (6)

b) What do you mean by insulating materials? Explain its classification based on (4)

temperature.
PART C
Answer any two questions, each carries 10 marks
12 a) Explain streamer theory of breakdown in gases. (6)
b) Define suspended particle theory. (4)
13 a) Explain properties and applications of iron. (6)
b) Explain the applications of magnetic materials in electrical machines. (4)
14 a) How breakdown occur in vacuum insulators? Explain any one mechanism. (6)

Page 1 of 2