B B7034A

Total Pages: 2

Reg Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2017

Course Code: EC303
Course Name: APPLIED ELECTROMAGNETIC THEORY (EC)

Max. Marks: 100 Duration: 3 Hours
(Smith Chart to be supplied on request)

PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Given D 27 ೦೦808) — (sin®/3r) ‏.يد‎ Find flux crossing portion of z=0 plane (7)
defined by rb) Let (13, region is defined by ೫೮0 and region2, x>0 has [॥2=5. (8)
If H;=4ax+3ay-6az A/m, find ‏جم‎ and the angle it makes with normal.
2 a) In spherical coordinates, V=-25 on a conductor at r=2cm and V=150 at (7)
1=35cm.the space between the conductors is dielectric filled for which ൧3.12.
Find surface charge densities on the conductors.
b) A travelling wave is described by ‏نز‎ = 10 sin(fz-wt). Sketch the wave at ൧0, t=t; (8)
and 1-0, where it advanced by 2/8 and 2/4 respectively. Velocity is 3x10°m/s and

o=10°rad/s.
3 8) Derive the capacitance and inductance of a two-wire line. (8)
b) Write Maxwell’s equation in phasor form. (4)

c) Draw electromagnetic flow diagram showing the relationship between potentials (3)
and vector fields of electromagnetic system (time varying case).

PART B
Answer any two full questions, each carries 15 marks.

4 a) In free space (750) a plane wave with H=/0cos(1 0-020, mA/m is incident (8)
normally on a lossless medium (€=2€,u=8 10) in the region z>0. Determine ‏بر‎
‎H, and ‏بط‎ 11
b) Describe the following terms: (7)
i) Characteristic impedance ii) Lumped and distributed elements
5 8) Derive the expression for refraction and reflection coefficient of plane (7)
electromagnetic waves that undergoing oblique incidence with vertical
polarization (considering boundary separation).
b) Derive the ABCD parameters of a transmission line. (8)
6 a) An EM wave 1187015 in free space with electric field component (8)
Es=100e 080054). V/m. Determine ര. A, magnetic field component and time
average power in the wave.
b) A distortion less line has ൧൦60൨; a=20mNp/m; u=0.6c. Find R,L,G,C ஊம்‌). at (4)
100MHz.

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