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Practice Final
P
ROBLEM
1:
a)
State the conditions necessary for radiation of EM waves.
b)
Show that positive charges moving at constant velocity do not produce a radiating EM waves.
c)
What is the nature of the EM wave field in part (b)?
P
ROBLEM
2:
Consider an electromagnetic generator, comprising a rectangular loop rotating at a rate of
ω
rad/s. The
total flux linkage
Φ
is given by
a)
Plot of
Φ
(t).
b)
Plot the generator voltage as a function of time if the loop is rotating a rate of 3000 revolutions per
minute and
Φ
o
=10
3
Wb.
P
ROBLEM
3:
The instantaneous electric field in a lossy medium is given by,
(a)
What is the instantaneous magnetic field
H
?
(b)
How much power is collected by a 2 cm
2
detector at a distance of 1 km from the origin.
P
ROBLEM
4:
A parallel plate capacitor, filled with a dielectric that has a conductivity
σ=10
−4
Sm
1
and a relative
permittivity of 9,
is a driven by a sinusoidal source at frequency f. The plates have area S = 2 cm
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This note was uploaded on 02/24/2010 for the course ESE 319 taught by Professor Dhadwal during the Fall '08 term at SUNY Stony Brook.
 Fall '08
 DHADWAL

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