Download AKTU B-Tech 8th Sem 2016-17 Electrical And Electronics Engg. Materials Question Paper

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B. TECH.

THEORY EXAMINATION (SEM–VIII) 2016-17

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ELECTRICAL AND ELECTRONICS ENGG. MATERIALS

Time: 3 Hours Max. Marks : 100

Note : Be precise in your answer. In case of numerical problem assume data wherever not provided.

SECTION – A

1. Attempt all parts of the following questions: 10 x 2 = 20
   1. Define fatigue in materials.

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   2. What are unit cells?
   3. Define polymorphism and allotropy in crystal.
   4. Classify different solid materials based on conductivity.
   5. Define Fermi energy.
   6. What do you mean by doping?

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   7. Write few applications of superconductivity
   8. What do you mean by ionic bonds .Give example.
   9. Define magnetic induction, or magnetic flux density.
   10. What are intrinsic and extrinsic semiconductors?

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SECTION – B

2. Attempt any five of the following questions: 5 x 10 = 50
   1. Explain superconductivity phenomenon in detail.
   2. Explain X-RAY diffraction phenomenon.
   3. Explain piezoelectricity in materials.
   4. Explain transistors and their phenome of operation.

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   5. Explain types of polarization.
   6. Explain Hall Effect in detail.
   7. Determine atomic packing fraction and volume of FCC crystal structure.
   8. Explain stress strain concept in solids.

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SECTION-C

Attempt any two of the following questions: 2 x 15 = 30

3. Explain defects in crystals.
4. Draw table for Lattice Parameter Relationships and Figures Showing Unit Cell Geometries for the Seven Crystal Systems.
5. Classify different magnetic materials.

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