Re: I need help.

[David Bowman <dbowman@TIGER.GEORGETOWNCOLLEGE.EDU>]

Regarding Bernard C.'s recollection:

> ...
> One of my references pointed out that the resistance between two embedded
> electrode spheres in the earth (rather more closely infinite embedding
> medium) was ~ independent of their separation > a certain minimum
> separation.  --IF I REMEMBER CORRECTLY.

You do remember correctly.  As long as the two electrode spheres are
placed *much* farther apart from each other than each of their
individual radii, then the asymptotic finite resistance between them
is given by:  R = ([rho]/(4*[pi]))*(1/a + 1/b)  where [rho] is the
resistivity of the background medium and a & b are the respective
radii of each of the conducting electrodes spheres.

David Bowman
David_Bowman@georgetowncollege.edu