ELE370 — Engineering Electromagnetics — Summer 2017
Exam 6
Problem [1] <10 points>
An electromagnetic wave is propagating in a low loss medium in +z direction, The magnitude of the electric
field is measured as 10 V/m at z0rn, and it is measured as 1 ‘Vlm at Calculate the skin depth c5 in this
medium
Problem [2] <10 points>
Conductivity of copper is a = 5.8 x107. A copper wire with square cross-section has length 50 meters and 1 MITI thickness, Calculate the DC resistance of this wire
Problem [3] <10 points>
Consider the copper wire in Problem 2. Calculate the AC resistance of this wire at 20 Gilz.
Problem [4J <10 points>
The electric field propagating in R direction in free space is given as ,,,,The magnetic field can
Problem [5] <10 points>
Consider the electromagnetic wave in Problem 4. –The Poynting vector can he given as ,75
Problem [6] <10 points>
The Poynting vector in free space is given as S =100____ R. Calculate total power passim?, through a spherical R2 co-centered at the origin of the coordinate system. The radius of the sphere is 5 meters
Problem [7] <10 points>
Figure shows a parallel plate transmission line with following parameters
=3mtn,h =1.mm,cr= 3,p, =1,a = 0a. = 0, . Calculate the characteristic impedance of this transmission line
Problem [8] <10 points>
The wavelength on a transmission line is measured as lm at 100 MHz, The characteristic impedance is 500 Calculate the per unit length inductance
Problem [9] <10 points>
A 15 volts voltage source generates an incident voltage wave of 10 Volts on a transmission line. Calculate the source resistance
Problem [10] <10 points>
Consider the circuit in Problem 9. The accompanying incident current wave is 0.1 Amps. Calculate the reflected current wave from a 50 Ohms load
1 Answer