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    Re: Ohm's Law????????
    From: Ken James
    Date: 2004 Oct 15, 19:52 -0500

    > Any PN junction is nothing but a variable resistor.It doesn't operate in a
    > linear fashion but it is still subject to Ohm's Law.
    > You'd better guess again about your statement reguarding it doesn't apply
    > contacts between 2 corroded metal surfaces either.
    In the case of most diodes, an increase of voltage beyond a certian amount
    will no longer lead to a concurrent and proportional increase in
    current...rather the voltage drop across the junction will not change by
    much although the current will change a lot. That is not in accordance with
    Ohm's law.
    Although I believe that it is possible for the two corroded conductors to
    function like a diode to some extent, I think it is quite likely that plasma
    created at the point of connection would be the overiding current transport
    mechanisim, not the corrosion itself, which would be burned through, so the
    resistance would therfore change due to that. -Ken

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