VASAVI COLLEGE OF ENGINEERING (Autonomous), HYDERABAD

B.E. I & II Semester (Common to all Branches) (Main) Examinations, July-2022

Engineering Physics

Time: 3 hours Max. Marks: 60

Note: Answer all questions from Part-A and Part-B.

Part-A (10 x 2 = 20 Marks)

1. Explain the significance of wave function.

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2. Write the applications of lasers.
3. Draw the stress-strain curve for a ductile material.
4. Define viscosity and write its SI unit.
5. What are the advantages of optical fiber communication?
6. What are the properties of ultrasonic waves?

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7. Define Fermi level and Fermi energy.
8. What is meant by Miller indices?
9. Write the applications of nanomaterials.
10. Distinguish between intrinsic and extrinsic semiconductors.

Part-B (4 x 10 = 40 Marks)

(Answer any four questions)

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1. a) Derive Schrodinger’s time independent wave equation. (5 Marks)
   b) Explain the construction and working principle of Ruby laser. (5 Marks)
2. a) Define Young’s modulus, Bulk modulus and Rigidity modulus. Establish the relation between them. (5 Marks)
   b) Explain different types of Non-Destructive Testing methods. (5 Marks)
3. a) What is an optical fiber? Explain the principle of propagation of light in optical fibers. (5 Marks)
   

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   b) Explain different applications of Ultrasonic waves in engineering. (5 Marks)
4. a) Explain the Kronig-Penny model for the motion of an electron in a periodic potential. (5 Marks)
   b) Describe the different types of crystal systems with neat diagrams. (5 Marks)
5. a) Explain the classification of nanomaterials. (5 Marks)
   b) Explain the working principle of solar cell. (5 Marks)

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