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From: email@example.com (carltons)
Subject: Re: output impedance
User-Agent: NewsWatcher-X 2.2.3b2
NNTP-Posting-Date: Sat, 09 Nov 2002 03:14:17 GMT
Date: Sat, 09 Nov 2002 03:14:17 GMT
In article , "Reg Edwards"
> > The impedance is in parallel with the current source, not in series. Look
> > the Thevenin-Norton theorem.
> I have had 60 or more years of understanding electric circuits and have
> NEVER NEVER needed to refer to a "theorem". I have never even heard or have
> long forgotten most of them or what they are about. Nothing beyond Ohm's
> Law has ever been of any use.
> Anybody who drags up a theorem in support of some explanation or other
> understands very little of what he/she is waffling about and is merely
> plagiarising and parotting an old wives' tale. To mention a theorem is an
> admission of ignorance. Or an admission that he/she has a memory and has
> read something somewhere. Or who had a teacher who was none the wiser
> Painting by numbers? The answer to your question is Theorem 19. Or is it
> 33.5 ? End of answer.
> OK? Next question please.
Measure the voltage and current magnitudes in a load with two terminals
and determine the imaginary part knowing the real part without any
theories. Do you do this with clairvoyance? How does current flow
"through" a device with two conductors and an insulator in between them?
Magic? Better tell Ben to get rid of his Leyden jars. I bet Armstrong
jumped right to the explanation for the operation of a vacuum tube just by
observing the glow of the filaments. Who needs theories? I would say all
who have gone before and did the work for me and others.
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