ர 00000EC303121902 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth semester B.Tech degree examinations (S) September 2020

Course Code: EC303
Course Name: APPLIED ELECTROMAGNETIC THEORY
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) State and explain Ampere’s law and Coulomb’s law (8)

b) Consider a region between two electrodes separated by a distance, d, having a (7)
uniform charge density of 0५ .Voltage on one electrode is Vo and other electrode

is 0۷ . Find the expression of electric field in terms of Vo, py andd.

+۷

೪01

Area $“

2 a) Ina lossy dielectric medium , characteristic impedance of the medium is 173 + (7)
1100 ६2 , Expression of Magnetic field of a plane wave is given by
H= 10 e™ cos(mt — 0.55) 4, A/m . Find
i. Direction of propagation
ii. Loss tangent
iii. | Attenuation constant
iv. Phase constant
v. Skin depth
b) State and explain Skin Depth . For a good conductor , prove thata=B,where,a (8)

is the attenuation constant and 0 is the phase constant .

3 ൮ Derive continuity equation from fundamental laws. (8)
b) Explain boundary conditions for Electric field and Magnetic field. (7)
PART छ

Answer any two full questions, each carries 15 marks.
4 a) Derive the expression for reflection coefficient for a wave of parallel (8)