Paper Set - II
Subject: Engineering Physics I
Time: 2:00 Hours ] [ Marks: 40
INSTRUCTIONS TO CANDIDATES
All Questions carry Equal
Marks as indicated.
Solve FOUR questions as
instructed
Assume suitable data
Draw neat sketches
wherever necessary.
Use of calculator is
permitted.
Q1. (a)Write Plank’s Quantum
Hypothesis with energy level diagram
(2)
(b)State any four Properties
of Photons. (2)
(c)What is Compton Effect? Explain
Compton shift with equation.
Prove it graphically. (3)
(d)If the incident radiation is 1.16 Ă.
Find the wavelength of scattered radiations at angle 450. (3) OR
(b)State any four Properties of Photons. (2)
(c)What is Compton Effect? Explain Compton shift with equation.
Prove it graphically. (3)
(d)If the incident radiation is 1.16 Ă. Find the wavelength of scattered radiations at angle 450. (3) OR
Q2. (a)Prove
that light exhibit both wave as well as particle nature.
(2)
( (b)Explain
that the wavelength of Macroscopic bodies is insignificant in comparison
to the size of the bodies. Calculate the value for wavelength. (2)
(c)Explain
this statement with the help of Davisson & Germer Experiment.(3)
(d)Find
the De-broglie wavelength of an electron accelerated through a potential
difference of 168 v
(3)
Q3. (a) Calculate the nearest neighboring distance for SC and BCC (4)
(b)Find
out APF, Co ordination No. in BCC and FCC
(2)
(c)Differentiate
between Tetrahedral and Octahedral Voids.
(2)
(d)Molybdenum
belongs to BCC lattice. Its density is 10.2 X 103 Kg/m3and
its atomic weight is 95.94. Determine the radius of Molybdenum
atom. (2)
OR
Q4. (a) Deduce
a relation between an interlinear distance d and the Miller indices of the
planes for cubic crystal.
(4)
(b)
Draw the following Miller Indices planes [1 ̅10],[231],[112] (3)
(c)
Explain and deduce Bragg’s Law for X-Ray diffraction. (3)
Q5. (a)
Define phase velocity and group velocity. (2)
(b)Explain
the application of Heisenberg’s Uncertainty principle with the help of
Thought experiment. (4)
(c) Explain the interpretation of wave function and write the normalization of
wave function.
(2)
(d)Write
3D time dependent Schrodinger Equation. (2)
OR
Q6. (a)Write
three dimensional time dependent Schrodinger Equation. (2)
(b)Deduce the equation for Wave function of particle confined in an infinite
one dimensional potential Well of length ‘L’
(4)
(c)Discuss the tunnling effect with the help of schrodinger Equation.
(2)
(d)Calculate
the value of lowest two energy state for electron confined in the infinite
potential well of width 15 Ǻ (m = 9.11 x 10-31 Kg, h
= 6.626 x 10-34 J.s) (2)
Q7. (a)Explain
p-type and n- type semiconductors with suitable diagram. (3)
(b)Write
down the Fermi - Dirac Equation for the probability of occupation of an
energy level E by an electron. (4)
(c)Explain how fermi level changes with increasing amounts of impurity in
n-type and p-type Semiconductor.
(3)
OR
Q8. (a)What is Hall
Effect?
(2)
(b)Give expression for each of the following parameters Hall Voltage, Hall
Coefficient, Hall Mobility.
(6)
(c)Mention the importance of Hall Effect in the field of
Semiconductor.
(2)
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