Download Goa University BA LLB-5 Years 2016 April 2nd Semester General English II Question Paper

ANNAMACHARYA INSTITUTE OF TECHNOLOGY & SCIENCES :: RAJAMPET

(AUTONOMOUS)

I B. Tech II Semester (R20 Regulations) Regular Examinations - July 2021

ENGINEERING PHYSICS

Time: 3 Hrs

Max. Marks: 70

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Note: Answer All Questions

PART - A

5 x 2 = 10 Marks

1. a) Define the terms: i) Reverberation ii) Absorption coefficient.

b) Write the applications of lasers in various fields.

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c) Distinguish between single mode and multimode fibers.

d) State and explain Bragg's law of X-ray diffraction.

e) Define drift velocity and mobility.

PART - B

5 x 12 = 60 Marks

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2. a) What is meant by absorption coefficient? Obtain Sabine’s formula for reverberation time. (6M)

b) What are the conditions for a good auditorium? Explain how these conditions are achieved. (6M)

OR

3. a) Explain the construction and working of Piezoelectric oscillator method to produce ultrasonics. (6M)

b) What are the applications of ultrasonics in engineering? (6M)

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4. a) Explain the principle and working of He-Ne laser with neat energy level diagram. (6M)

b) Deduce the relation between Einstein’s coefficients. (6M)

OR

5. a) Describe the construction and reconstruction of a hologram. (6M)

b) Explain different types of optical fibers. (6M)

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6. a) Derive an expression for the interplanar spacing in a cubic crystal system. (6M)

b) Explain the powder method of crystal structure determination. (6M)

OR

7. a) Define crystal lattice, unit cell and lattice parameters. (6M)

b) Describe the structure of diamond. (6M)

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8. a) Derive an expression for the carrier concentration of an intrinsic semiconductor. (6M)

b) Explain the formation of P-N junction diode. (6M)

OR

9. a) Explain the concept of effective mass of an electron. (6M)

b) Derive an expression for the electrical conductivity in intrinsic semiconductors. (6M)

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