Reg No.:

Max. Marks: 100

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ما ی ~ ‎ॐ‏

10

a)
b)

02000EE206052001
Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fourth semester B.Tech examinations (S), September 2020

Course Code: EE206
Course Name: MATERIAL SCIENCE (EE)

PARTA
Answer all questions, each carries 5 marks
What are the properties of materials utilised in (i) Rheostats
(൧ Solders?
Also mention some of the materials used for the above.
Write a short note on 1) spontaneous polarization and 2) ferroelectric materials
and its applications
Explain the testing procedure of transformer oil.
Write notes on the magnetic materials used in (i) Electrical machines
(ii) Relays
Differentiate Type I and Type II superconductors.
What is the significance of organic solar cells?
Explain optical microscopy.
Define nanomaterial. Highlight any two possible a) applications and b) its
limitations or major challenges.
PART छ
Answer any two questions, each carries 10 marks

Derive Clausius — Mosotti relation.
Define dielectric polarization and write the expression relating polarization P,
Electric field E and permittivity ¢,¢9 Comment on its physical significance.
Explain a good insulating material in terms of its

a) Electrical

b) Mechanical

c) Thermal.

d) Chemical properties.

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Duration: 3 Hours

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