12

13

14

15

16

17

a)

b)
a)

b)

a)

b)

a)

b)

F1009 Pages: 2

PART ட்‌
Answer any two full questions, each carries 10 marks.

Apply Biot-Savart law and determine an expression for magnetic field intensity
at a point due to an infinitely long straight conductor carrying current I.
Explain continuity equation for current.
State Ampere’s circuital law and explain any one application of Ampere’s
circuital law
Derive the boundary conditions with respect to the electric field at the interface
of a dielectric — dielectric boundary
Derive an expression for energy stored in an electrostatic field in terms of
electric flux density.
What is electric polarisation? Explain.
PART 0

Answer any two full questions, each carries 10 marks.
State and explain Poynting theorem and Poynting vector. Also derive an
expression for average power density.
A uniform plane wave is travelling at a velocity of 2.5 x 10° m/s having
wavelength 7. = 0.25mm in a non magnetic good conductor. Calculate the
frequency of wave and the conductivity of a medium.
What are electromagnetic waves? Explain the concept of uniform plane waves.

Derive the wave equations for a transmission line.

Page 2 of 2

(7)

(3)
(5)

(5)

(7)

(3)

(10)

(5)

(5)
(10)