Jawaharlal Nehru Technological University Hyderabad 2005 B.E Computer Science APPLIED PHYSICS I B.Tech Supplementary s, emr/emr - Question Paper

Code No: NR10201 NR
I B.Tech Supplementary Examinations, November/December 2005
APPLIED PHYSICS
(Common to Electrical & Electronic Engineering,Electronics &
Communication Engineering,Computer Science & Engineering,Electronics &
Instrumentation Engineering,BioMedical
Engineering,Information
Technology,Electronics & Control Engineering,Computer Science & Systems
Engineering,Electronics & Telematics and Electronics & Computer
Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
? ? ? ? ?
1. (a) What is cohesive energy? Assuming a suitable model for interatonine
forces derive an expression for the cohesive energy.
(b) What is Madelung constant? compute its value for NaCl.
[10+6]
2. (a) elaborate Miller indices? How are they obtained?
(b) Derive an expression for the interplanar spacing ranging from 2 adjacent
planes of a cubic lattice.
(c) Sketch (100), (110) and (111) planes of a cuibic crystal.
[5+8+3]
3. (a) Derive Bragg’s legal regulations for Xray
diffraction in crystals.
(b) define Laue’s method for determination of crystal structure.
(c) A beam of Xrays
(? = 1A.U) is made to incident on a set of crystal planes
whose separation is five A.U. compute the angle for the 4th Bragg
reflection.
[6+6+4]
4. (a) Derive time independent Schrodinger wave formula for an electron.
(b) What is the physical significance of the wave function?
(c) Show that the energies of a particle in a potential box are quantized.
[8+4+4]
5. (a) discuss in detail the subsequent
i. Meissner effect and
ii. Penetration depth.
(b) elaborate hard and soft superconductors? discuss.
[10+6]
6. (a) discuss the terms
i. magnetic flux density
ii. magnetic field strength
iii. magnetization and
iv. magnetic susceptibility. How are they related to every other?
(b) discuss the difference ranging from antiferromagnetism and ferrimagnetism.
[10+6]
7. (a) Derive the expressions for
i. acceptance angle and
ii. numerical aperture of an optical fiber.
(b) define various kinds of fibres by giving the refractive index profiles and
Propagation details.
[8+8]
8. Write short notes on the subsequent
(a) Line Imperfections of crystals
(b) KronigPenney
model.
(c) Electronic polarization
(d) HeNe
laser.
[4×4]

Earning:   Approval pending.