MU Electronics and Telecom Engineering (Semester 4)
Wave Theory & Propagation
December 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Attempt any four out of the five:-
1 (a) Write integral from of Amperes Law and interpret the same.
5 M
1 (b) Define Intrinsic Impedance. Calculate its value for free space.
5 M
1 (c) Give and explain various steps involved in finding characteristics impedance for micro-strip line using finite difference Method.
5 M
1 (d) What do you mean by Depth of pentration.
5 M
1 (e) What is loss Tangent. Explain how it classifies lossless dielectrics, lossy Dielectric and good conductor.
5 M

2 (a) Derive Maxwells equation in point form and integral form.
10 M
2 (b) Compare FDM, FEM & MOM.
5 M
2 (c) Compare scalar and vector potential.
5 M

3 (a) In certain Medium [ ar{E}= left [ 10e^{-0.05x} sin left ( 2 imes 10^8 t-2x ight ) ight ]ar{a}_2 v/m Find: ]
i) Propagation constant
ii) Wavelength
iii) Speed of wave
iv)Skin Depth
10 M
3 (b) Derive wave equation for good dielectric medium.
5 M
3 (c) Give Boundary conditions for Electric and magnetic field for interface between good conductor and dielectric.
5 M

4 (a) Use method of moment to find the capacitance of parallel plate capacitor of figure 1. Take a=1 meter; b=1 meter; d=1 meter and &epsilonr=1.

10 M
4 (b) Derive an expression for magnetic field intensity due to finite long straight element.
10 M

5 (a) What do you mean by Fading? How it can be minimized?
5 M
5 (b) Write a short note on Ionospheric Propagation.
5 M
5 (c) Explain Super Refraction and Tropospheric Fading.
10 M

6 (a) Prove that static electric field is irrotational ans static magnetic field solenoidal.
10 M
6 (b) Explain Reflection of Uniform Plane wave at Oblique Incidence.
10 M



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