Code.No: NR10201

SET-1

NR

1.a) b)

Derive an expression for electrical conductivity of a metal on the basis of classical free electron theory. Write notes on i) Thermionic emission and ii) Field emission. [8+8] Describe the motion of an electron in a periodic potential. On the basis of band theory how the solids are classified?

3.a)

Explain in detail the terms: i) Dielectric constant, ii) Dielectric loss and iii) Dielectric strength Distinguish between Ferro electricity and Piezoelectricity.

b) 5.a) b)

[8+8]

Explain Fermi-Dirac distribution for electrons in a metal. Discuss its variation with temperature. Write short notes on Shockley-Read-Hall theory of recombination. [10+6] What are drift and diffusion currents in a semiconductor? Explain. Derive an expression for continuity equation of charge carriers.

nt

6.a) b)

[8+8]

What are the characteristics of diamagnetic, paramagnetic and ferromagnetic substances? Explain their behavior with the help of examples. Write in detail the classical theory of diamagnetism. [8+8]

uW

4.a)

or ld

2.a) b)

b)

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD I B.TECH SUPPLEMENTARY EXAMINATIONS JUNE - 2010 APPLIED PHYSICS (COMMON TO EEE, ECE, CSE, CSIT, EIE, BME, E.CON.E, ETM, ECC, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

How are superconductors classified? Explain their properties. Write notes on the application of superconducting materials.

8.

Write short notes on any FOUR of the following: a) Hall effect b) Ferro-magnetism c) LED d) Avalanche Photodiode e) Thin film Solar Cells f) Fabrication of BJT. -oOo-

Aj

7.a) b)

[8+8]

[8+8]

[16]

Code.No: NR10201

SET-2

NR

b) 2.a) b) 3.a) b)

Explain in detail the terms: i) Dielectric constant, ii) Dielectric loss and iii) Dielectric strength Distinguish between Ferro electricity and Piezoelectricity.

What are the characteristics of diamagnetic, paramagnetic and ferromagnetic substances? Explain their behavior with the help of examples. Write in detail the classical theory of diamagnetism. [8+8]

Explain Fermi-Dirac distribution for electrons in a metal. Discuss its variation with temperature. Write short notes on Shockley-Read-Hall theory of recombination. [10+6] What are drift and diffusion currents in a semiconductor? Explain. Derive an expression for continuity equation of charge carriers.

5.a) b)

How are superconductors classified? Explain their properties. Write notes on the application of superconducting materials.

6.

Write short notes on any FOUR of the following: a) Hall effect b) Ferro-magnetism c) LED d) Avalanche Photodiode e) Thin film Solar Cells f) Fabrication of BJT.

nt

uW

4.a) b)

7.a)

8.a) b)

[8+8]

[8+8]

[16]

Derive an expression for electrical conductivity of a metal on the basis of classical free electron theory. Write notes on i) Thermionic emission and ii) Field emission. [8+8]

Aj

b)

[8+8]

or ld

1.a)

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD I B.TECH SUPPLEMENTARY EXAMINATIONS JUNE - 2010 APPLIED PHYSICS (COMMON TO EEE, ECE, CSE, CSIT, EIE, BME, E.CON.E, ETM, ECC, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

Describe the motion of an electron in a periodic potential. On the basis of band theory how the solids are classified? -oOo-

[8+8]

Code.No: NR10201

SET-3

NR

1.a) b)

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD I B.TECH SUPPLEMENTARY EXAMINATIONS JUNE - 2010 APPLIED PHYSICS (COMMON TO EEE, ECE, CSE, CSIT, EIE, BME, E.CON.E, ETM, ECC, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --Explain Fermi-Dirac distribution for electrons in a metal. Discuss its variation with temperature. Write short notes on Shockley-Read-Hall theory of recombination. [10+6] What are drift and diffusion currents in a semiconductor? Explain. Derive an expression for continuity equation of charge carriers.

3.a) b)

How are superconductors classified? Explain their properties. Write notes on the application of superconducting materials.

4.

Write short notes on any FOUR of the following: a) Hall effect b) Ferro-magnetism c) LED d) Avalanche Photodiode e) Thin film Solar Cells f) Fabrication of BJT.

b)

uW

5.a)

[8+8]

or ld

2.a) b)

[8+8]

[16]

Derive an expression for electrical conductivity of a metal on the basis of classical free electron theory. Write notes on i) Thermionic emission and ii) Field emission. [8+8] Describe the motion of an electron in a periodic potential. On the basis of band theory how the solids are classified?

[8+8]

7.a)

Explain in detail the terms: i) Dielectric constant, ii) Dielectric loss and iii) Dielectric strength Distinguish between Ferro electricity and Piezoelectricity.

[8+8]

Aj

nt

6.a) b)

b)

8.a)

b)

What are the characteristics of diamagnetic, paramagnetic and ferromagnetic substances? Explain their behavior with the help of examples. Write in detail the classical theory of diamagnetism. [8+8] -oOo-

Code.No: NR10201

SET-4

NR

How are superconductors classified? Explain their properties. Write notes on the application of superconducting materials.

2.

Write short notes on any FOUR of the following: a) Hall effect b) Ferro-magnetism c) LED d) Avalanche Photodiode e) Thin film Solar Cells f) Fabrication of BJT.

b)

[16]

Derive an expression for electrical conductivity of a metal on the basis of classical free electron theory. Write notes on i) Thermionic emission and ii) Field emission. [8+8]

uW

3.a)

[8+8]

or ld

1.a) b)

.in

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD I B.TECH SUPPLEMENTARY EXAMINATIONS JUNE - 2010 APPLIED PHYSICS (COMMON TO EEE, ECE, CSE, CSIT, EIE, BME, E.CON.E, ETM, ECC, CSS) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

4.a) b)

Describe the motion of an electron in a periodic potential. On the basis of band theory how the solids are classified?

[8+8]

5.a)

Explain in detail the terms: i) Dielectric constant, ii) Dielectric loss and iii) Dielectric strength Distinguish between Ferro electricity and Piezoelectricity.

[8+8]

nt

b) 6.a)

b)

Explain Fermi-Dirac distribution for electrons in a metal. Discuss its variation with temperature. Write short notes on Shockley-Read-Hall theory of recombination. [10+6]

Aj

7.a)

What are the characteristics of diamagnetic, paramagnetic and ferromagnetic substances? Explain their behavior with the help of examples. Write in detail the classical theory of diamagnetism. [8+8]

b)

8.a) b)

What are drift and diffusion currents in a semiconductor? Explain. Derive an expression for continuity equation of charge carriers. -oOo-

[8+8]