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NSA192002 Pages:3

sample of that wire has mass 1.2g. Find the speed and fundamental frequency
of transverse wave on the wire.
Module-II
With necessary diagram, write the formation of interference pattern in an air (10)
wedge and derive an expression for the diameter of a thin wire.
A monochromatic light of wavelength 5893 A is incident normally on a soap (4)
film of ‏پر‎ ಎ 1.42. What is the least thickness of the film that will appear dark
by reflection ?
Derive the grating equation and describe an experiment to determine the (10)
wavelength of light. Define resolving power of a grating with expression.
A grating has 6000 lines/em. Find angular separation between two (4)
wavelengths 577nm and 579 nm in the second order.
۸100101-1
Derive an expression for energy eigen values and normalised wave function (10)
for a particle in a box of width L.
Calculate the separation between the two lowest energy levels of an electron (4)
in a one dimensional box of width 4A in joules. Given me = 9.1 x 1031 kg;
h=6.625 x 10“ Js
Write a note on quantum confinement and based on this explain nano sheets, (10)
nano wire and quantum dots.
Mention any four applications of nanotechnology. (4)
Module-IV
State Gauss’ law in magnetism, Ampere’s circuital law, faraday’s laws of (10)
electromagnetic induction and Lenz’s law. Give their equations.
A magnetising field of 1800 A/m produces a magnetic flux of 3 x 10 5 Wb in (4)
an iron bar of cross - sectional area 0.2 em”. Calculate the permeability.
Starting from Maxwell’s equations derive the expression for the velocity of (10)

electromagnetic waves in vacuum.

State and explain Poynting’s theorem. (4)
Module-V
Explain the characteristics of Type I and Type II superconductors with (7)

appropriate diagrams and examples.

Discuss BCS theory of superconductivity. Give any four applications of (7)

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