Re: AN: GuruGram #39
From: John Woodgate (jmw_at_jmwa.demon.contraspam.yuk)
Date: 12/12/04
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Date: Sun, 12 Dec 2004 16:03:38 +0000
I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog
DOTyou.knowwhat> wrote (in <cc1or05455lgmndmut41derql23i8v6ahe@4ax.com>)
about 'AN: GuruGram #39', on Sun, 12 Dec 2004:
>The integral symbol on the left has a circle in the middle- it's a *line
>integral* (around a closed path).
Yes, that's a little paradoxical, because the voltage is there even if
the path isn't closed insofar as appreciable current can flow. For
example, you can measure it on the 200 mV range of a DMM, which has an
almost infinite input impedance, and by extrapolation it would still be
there if the impedance were really infinite.
-- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
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