Download JNTUA B.Tech 1-2 R15 2019 June 15A56101 Engineering Physics Question Paper

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Code: 15A56101


B.Tech I Year II Semester (R15) Regular & Supplementary Examinations May/June 2019
ENGINEERING PHYSICS
(Common to IT, ECE, EIE & ME)

Time: 3 hours Max. Marks: 70

PART ? A
(Compulsory Question)

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1 Answer the following: (10 X 02 = 20 Marks)
(a) Define interference of a light.
(b) State the working principle of an optical fiber.
(c) What is space lattice?
(d) State Bragg?s diffraction condition.
(e) Define matter waves.
(f) Write any two drawbacks of classical free electron theory.
(g) Distinguish intrinsic Vs extrinsic semiconductors.
(h) What is Bohr magnetron?
(i) What is Meissner effect?
(j) Write any four applications of nanomaterials.

PART ? B
(Answer all five units, 5 X 10 = 50 Marks)

UNIT ? I

2 Explain the theory and experiment of Newton?s rings.
OR
3 Explain the spontaneous and stimulated emission of radiation and Einstein coefficient.

UNIT ? II

4 Classify and explain the seven crystal systems.
OR
5 What are ultrasonics? What are its properties? Also explain few applications of ultrasonics in non-
destructive testing.

UNIT ? III

6 Derive the Schrodinger time dependent wave equation. Discuss the significance of wave function.
OR
7 Deduce the energy of a particle in a one dimensional infinite potential well.

UNIT ? IV

8 Explain the theory, experimental setup and applications of Hall measurements.
OR
9 Discuss the hysteresis curve of various magnetic materials. Justify the nature of curves.

UNIT ? V

10 Explain the BCS theory and its associated phenomena.
OR
11 Classify and explain the top-down synthesis methods.

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R15
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