My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Download Model question papers & previous years question papers
|
Posted Date: 14 Jul 2009 Posted By: satish Member Level: Diamond
|
2009 Jawaharlal Nehru Technological University Computer Science & Engineering Code No: Z0221 / R07 ,Jntu I B.Tech - Regular Examinations, June 2009 ,APPLIED PHYSICS Question paper
Code No: Z0221 / R07 Set No. 3
I B.Tech - Regular Examinations, June 2009
APPLIED PHYSICS
( Common to Electrical & Electronic Engineering, Electronics &
Communication Engineering, Computer Science & Engineering, Electronics
& Instrumentation Engineering, Bio-Medical Engineering, Information
Technology, Electronics & Control Engineering, Computer Science &
Systems Engineering, Electronics & Computer Engineering and
Instrumentation & Control Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) State and explain Bragg’s law.
(b) Describe with suitable diagram, the powder method for determination of crys-
tal structure.
(c) A beam of X-rays of wavelength 0.071 nm is diffracted by (1 1 0) plane of rock
salt with lattice constant of 0.28 nm. Find the glancing angle for the second
order diffraction. [4+8+4]
2. (a) Show that the wavelength (?) of an electron accelerated by a potential differ-
ence of V volts, is ?= 12.27
pV
°A. for non-relativistic case.
(b) Describe an experiment with a neat diagram, to establish the wave nature of
electrons.
(c) Calculate the velocity and kinetic energy of an electron of wavelength 1.66 °A.
[6+6+4]
3. (a) What is Bloch theorem? Explain.
(b) Discuss Kronig-Penney model for the motion of an electron in a periodic po-
tential. [6+10]
4. (a) Describe the phenomenon of electronic polarization and obtain an expression
for electronic polarizability.
(b) Write notes on:
i. Ferro-electricity and
ii. Piezo-electricity. [8+8]
5. (a) Explain in detail the following
i. Meissner effect and
ii. Penetration depth of a superconductor.
(b) What are hard and soft superconductors?
(c) Discuss the important applications of super conductors. [6+6+4]
6. (a) What is population inversion relating to laser action? Explain.(b) Distinguish between homo-junction semiconductor laser and hetero-junction
semiconductor laser.
(c) Calculate the wavelength of emitted radiation from GaAs which has a band
gap of 1.44 eV. [4+8+4]
7. (a) Distinguish between light propagation in (i) step index and (ii) graded index
optical fibers.
(b) Discuss the various advantages of communication with optical fibers over the
conventional coaxial cables.
(c) Calculate the refractive indices of core and cladding of an optical fiber with a
numerical aperture of 0.33 and their fractional difference of refractive indices
being 0.02. [6+6+4]
8. (a) Write a detailed note on nanoscience.
(b) Why nanomaterials exhibit different properties? Explain.
Return to question paper search
|
|
|
Submit Previous Years University Question Papers and make money from adsense revenue sharing program
Are you preparing for a university examination? Download model question papers
and practise before you write the exam.
|
Advertise Here
|