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Old March 23rd 06, 02:00 AM posted to rec.radio.amateur.antenna
John Popelish
 
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Default Current through coils

K7ITM wrote:
(Yawn) So, I have this system where there's a wave in each direction
and they are identical amplitudes so that there is zero loss to
radiation or thermal dissipation. And in this system there is a series
coil through which the waves pass, and the current at each end of the
coil is different amplitude. That means that the coulombs/second
passing a point at one end of the coil is different than the
coulombs/second passing the other end of the coil. The currents can be
in phase or counter-phase. In fact, if the phases of the currents at
the two ends of the coil were not the same, then even equal-amplitude
currents at each end would imply that, except at certain instants of
time, there are differing coulombs/second passing the points at either
end of the coil.

What happens to that imbalance in charge? Where does it go? What do
we call something that behaves that way? What's so freakin' special
about that?


The charge briefly piling up and then being sucked out of such an
inductor is the same place charge piles up and is sucked out of parts
of a transmission lines with standing waves on them. That is the
shunt capacitance to the rest of the universe from each part of the
coil or transmission line that momentarily stores this charge.

So, I guess the word you are trying to get me to say is "capacitance".
Nobody says it is "freakin' special", though. Its common as dirt.

What do I win?


 
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