[TCML] Capacitor Conundrum
resonance at wildblue.net
Sat Aug 23 16:58:48 MDT 2008
in physics, there is really no such thing as a monopole capacitor. The
electrostatic lines extend to infinity by definition and the math involved
(guage field theory). Even an isotropic capacitance such as a toroid, has
electrostatic field lines extending to ground, building walls, etc.
Yes, in your experiment if you extended the plates a distance the field
lines (charge at a given point along a particular line) would appear to be
weaker as the stored energy is integrated over the total volume of the
space, and upon returning the plates to close proximity they would retain
On Sat, Aug 23, 2008 at 11:59 AM, Ed Phillips <evp at pacbell.net> wrote:
> Thanks D.C.,
> For the great answer in plain talk. I know this subject goes much deeper
> into the quantum level than I can understand, but the analogy with
> electromagnetic fields helps to explain the principle.
> So, if a vacuum capacitor is charged to a high potential and then the
> plates are separated far enough, would you have two monopole capacitors
> with opposite charge? Then if the plates were brought back to their
> original spacing, would the charges be conserved? Similar to the Leyden jar
> experiment, but with no dielectric material, just empty(?) space.
> Tony Greer"
> Answer to your questions is yes to both. Note that because there is
> a force between the plates you'd have to do work to separate them and that
> since the same charge is now contained in a lower capacitance the voltage
> between the plates would be increased. That work would be returned if you
> allowed the plates to return to their original position.
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