Download OU B-Tech First Year 2015 June 9357 Faculty Of Engineering Question Paper

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Note: Answer all questions from Part - A and answer any five questions from Part-B.
PART ? A (25 Marks)
1. Newton's Rings are observed by keeping a spherical surface of 100 cm radius on a
plane glass plate. If the diameter of the 15
th

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bright ring is 0.590 cm, what is the wave
length of light used?
2 Define the phenomenon of " Optical activity" (2)
3. Define the terms " Acceptance angle" and "numerical aperture (NA),
,

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o. an optical
Fibre. r .
(2)
4. In a Ruby laser, total no.of Cr
+3

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ions is 2.8 X 10
19
. If the laser'eni0 radiation of
Wave length 7000A
?

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, calculate the energy of the laser p61"."S,
?

5. If (3,2,6) are miller indices of a plane, the intercepts made l*the plane on the three
crystallographic axes are

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N?.
(a) (a,b,c) (b) (a, 2b, 3c) (c) (2a, 3b, (d) none of the above.
6. What is LED?
7. Explain the Frequency and temperature dependence of dielectric polarization.
8. What is Meissner's effect? K, ?. .

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9. Explain working Principle of Solar cell." 46
10. Explain the Principle of Atomic force Miqueopy
i"?6.4"T B (SO Marks)
11 (a) Explain the diffraction due toa. Jingle slit and obtain its intensity equation and
discuss different intensitycdpditions.

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(b) Describe the constr4ctionVd working of He-Ne gas laser with energy level
diagrams.
4.?. I
'
12 (a) Derive Fermi-Dirac Distribution statistics.

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(b) Apply the SchOdinger's wave equation to a particle in an infinite square well
potentiakand 'derive the expression for energy level of the particle.
13 (a) CalcUlAte the "Atomic radius", "Coordination number " and " Packing Fraction" of
C,'13,Ca'and FCC crystals.
(

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5
)
(b) Hall effect and derive the expression for Hall voltage and Hall coefficient. (5)
(
5

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(2)
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14 (a) Explain the method for determination of dielectric constant by Capacitance Bridge
method.
(b) What are High T
e

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Super conductors and mention any four applications of super
conductors.
15 (a) Explain Thermal evaporation and electron beam evaporation techniques of thin
fil m preparation.
(b) Describe the construction and working of Scanning Electron Microscope (SEM).

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16 (a) Explain the construction and working of Nicol's Prism.
(b) Explain different types of optical Fibre and how they effect the pulse dispersion.
17 (a) Calculate the equilibrium concentration of Schottky defects.
(b) Explain "Sol-gel' and "Ball-Milling methods for preparation of nano materials.
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