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Pages: 2

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Max. Marks: 100

1 a)
b)
2 a)
b)
3 a)
b)
4 a)
b)

Course Code: EC303
Course Name: APPLIED ELECTROMAGNETIC THEORY

PARTA

Answer any two full questions, each carries 15 marks.
Derive the expression of energy stored in electric field.
Four 10-nC point charges are located in the z=0 plane at the comers of a square
8cm on a side. A fifth 10-nC positive charge is located at a point 8cm distant
from each of the other charges. Calculate the magnitude of the total force on the
fifth charge for € = ಉೃ.
Derive the boundary conditions of electric field and magnetic field from
Maxwell’s equations at the interface of dielectric-dielectric medium.
A lossy dielectric has an intrinsic impedance of 50210° ൭ at a particular
frequency. If at that frequency, the plane wave propagating through the dielectric
has the magnetic field component H = 106൪ cos(wt — 59) a, A/m find (i) E
(ii) @ (iii) Skin depth
State Maxwell’s equations in differential form, integral form and mention the
laws from which each of the equation is derived.
Derive Continuity equation.

PART 0

Answer any two full questions, each carries 15 marks.
Derive the expression for reflection and transmission coefficients field when a
plane wave having parallel polarization is incident obliquely at an angle 9; on the
boundary (2 plane) at ×0 between medium 1 (250) characterized by 41, €1, 04
and medium 2 (z>0) characterized by ८2, €2, 02 .
A 100Q lossless line is terminated by unknown load impedance Z,. If at a
distance 0.24. from the load the voltage is V; = 1 + 2/1 while the current is
5mA. Find the load impedance and VSWR.

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Duration: 3 Hours

Marks

(7)
(8)

(6)

(9)

(7)

(8)

(7)

(8)