Dr. A.P.J. Abdul Kalam University BE IV SEM (EC) Material Science [ES220T] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Fourth Semester Main Examination, June-2021

Material Science [ES220T]

Branch: EC

Time: 3:00 Hrs Max Marks 70

Note: 1. Attempt any five questions out of eight.

2. All question carry equal marks.

Q.1 (a) Write a short note on orbital magnetic dipole movement and angular

momentum of simple atomic model.

(b) What do you mean by dipolar relaxation?

Q.2 (a) Explain Bragg's Law in details.

(b) Write short note on :(i) Bravais lattice (ii)Composite material.

Q.3 (a) What is Curie-Weiss law? Also explain spontaneous magnetization

(b) Explain spin magnetic moment in details.

Q.4 (a) Explain magnetic resonance in details.

(b) What do you mean by atomic structure? Also explain molecules and

general bonding principles

Q.5 (a) Explain atomic interpretation of Ohm's law of conductor.

(b) Explain high conductivity and high resistivity material.

Q.6 (a) Explain conductors and also write properties of superconductor.

(b) Write short note on Linde's rule and Joule's rule.

Q.7 (a) Explain optical fibers and fiber materials?

(b) Write short note on Solar cell and Fuel cell?

Q.8 Write short note on following: i) carbon dioxide laser ii) Nd-YAG laser

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