🚀 go-pugleaf

wolfgang@haddock.UUCP (Wolfgang Rupprecht) writes:
> 	What is the resistance of earth ground? Let's say we have two
> good connections to the earth, say two Chevettes :-), dropped into the
> ocean, one into the Pacific and the other Atlantic. With an ohm-meter
> connected between them, what kind of resistance can I expect to see?

One thing you run into is that with a point contact to a 3D medium,
resistance of the contact is dominated by what happens near the
contact:  Consider a spherical shell A of finite thickness around the
contact, and another B with double the radius and thickness.  The
contribution of A to the contact resistance is twice that of B.  If
the contact is a perfect point, the contact resistance is infinite!

Getting back to the example, the Chevettes make pretty good contact
with a lot of ocean, so the resistance would probably be damn close to
zero.

Dale


-- 
Dale Worley	Cullinet Software		ARPA: cullvax!drw@eddie.mit.edu
UUCP: ...!seismo!harvard!mit-eddie!cullvax!drw
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