Download OU B-Tech First Year 2013 June 2004 Engineering Physics Question Paper

Download OU (Osmania University) B.Tech (Bachelor of Technology) First Year (1st Year) 2013 June 2004 Engineering Physics Question Paper

Code No. 2004
FACULTY OF ENGINEERING & INFORMATICS
B.E, I?Year (Common to all Branches) (Main) Examination, June 2013
Subject: Engineering Physics
Time: 3 Hours Max.Marks: 75
Note: Answer all questions from Part A. Answer any five questions from Part B.
PART ? A (25 Marks)
1. What are the basic principles of Holography?
(2)
2. If the diameter of two consecutive Newton's rings in reflected light of wave length
5890 A
?
are 2.0 and 2.02 cms respectively. Calculate the radius of curvature of the
lens.
(2)
3. Obtain Rayleigh-Jeans law and Wein's law from Planck's law. (2)
4. Define pointing vector.
(2)
5. Calculate the packing fraction for SC, BCC and FCC crystals.
(3)
6. The intrinsic carrier density at 300 K in silicon is 1.62 x 10
16
/m
3
. If the electron and
hole mobilities are 0.13 and 0.06 m
2
1/
1
S
-1
respectively. Calculate the conductivity of
intrinsic silicon.
(3)
7. Distinguish hard and soft magnetic materials.
(2)
8. Distinction between bulk, thin films and nano materials.
(3)
9. What are type II superconductors? Explain their importance.
(3)
10. What is sputtering? Explain the advantages of sputtering deposition.
(3)
PART B (50 Marks)
11.(a) Describe Fraunhoper diffraction of light due to single slit and explain maxima and
minima conditions and derive the expression for resultant intensity.
(
6
)
(b) Explain the working of He-Ne laser with the help of neat diagram by giving energy
level transitions.
(4)
12.(a) Derive the expression for Planck's law of radiation by considering the Bose-Einstein
distribution function.
(5)
(b) Derive an expression for the velocity of propation of a plane e.m. wave in
homogeneous, isotropic dielectric medium by using Maxwell's equations.
(
5
)
13.(a) Explain the salient features of Kronig-Penny model and its conclusions for formation
of energy bands in solids.
(6)
(b) State and explain the Miller Indices.
(4)
14.(a) What are dielectrics? Explain different types of electric polarization mechanisms
contributing to the total polarization of dielectric materials.
(6)
(b) What is superconductivity? Describe the preparation of high T, superconductors.
(4)
15.(a) Explain the construction and working of TEM-transmission electron microscope.
(6)
(b) Describe the chemical vapour deposition (CVD) method for preparation of thin films. (4)
16.(a) Explain the preparation of nano materials by sol-gel method.
(5)
(b) What is the principle of X-ray fluorescence and mention its applications?
(
5
)
17.(a) Describe the powder diffraction experimental method for determination of
"interplanner spacing" of a crystal.
(5)
(b) What are ferrites? Explain its spinal and inverse spinal structure.
(5)
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