RE: How many volts ?

[LUDWIK KOWALSKI <kowalskil@alpha.montclair.edu>]

Bob Sciamanda writes:

> There are two different arguments that the isolated, charged, infinite 
> conducting sheet is uniformly charged (also applicable to the two, 
> unequally charged sheets of conductor):

   1) Symmetry: on the infinite sheet, all points are equivalent and 
      indistinguishable from one another.

   2) The uniqueness theorem of LaPlace's equation plus boundary conditions:
      Since the uniform charge solution works, it is the only solution.

      The plates are NOT infinitely large in my problem. I know that d=1 cm 
      is already quite small for plates whose diameters are 100 cm. Yes,
      fringe effect becomes negligible when |Q1|=|Q2|. How do you know it
      is also negligible when one charge is ten times larger than another?

                                         Ludwik