[Prev][Next][Index][Thread]
Re: Capacitor charge, were is it?
On 10/27/96 22:25:04 you wrote:
>
>> Subject: Re: Capacitor charge, were is it?
>> >Subject: Capacitor charge, were is it?
>
>>From bert.hickman-at-aquila-dot-comSun Oct 27 21:45:13 1996
>Date: Sun, 27 Oct 1996 10:43:20 -0800
>From: Bert Hickman <bert.hickman-at-aquila-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Capacitor charge, were is it?
>
>Tesla List wrote:
>> >>From huffman-at-fnal.govFri Oct 25 21:56:12 1996
>> >Date: Fri, 25 Oct 1996 10:33:24 -0500
>> >From: huffman <huffman-at-fnal.gov>
>> >To: List Tesla <tesla-at-pupman-dot-com>
>> >Subject: Capacitor charge, were is it?
>> >Group,
>> >I'm having trouble with the idea of charge being stored in the
dielectric.
>> >This may not be totally Tesla related but I would like some comments,
>> >stones, etc.
>> >
>> >R. Hull post - All of the charge is held in the dielectric of the
secondary
>> >and not the
>> >metallic components. This is the case in all capacitors. The plates
can
>> >never store charge!.. Only conduct it to a point where work can be done
>> >electrodynamically.
>> >
>> >If this is true we could not have a capacitor with a charge that has no
>> >dielectric (vacuum).
>>
>> Since a vacuum is a conductor (i.e vacuum tube), you cannot have a
potential
>> difference (charge) in a pure vacuum. This concept is theoretical.
>
>Phil,
>
>Not quite... :^)
>
>Jennings and Kilovac are a couple of companies making vacuum capacitors
>and vacuum relays. Both depend upon the excellent high voltage
>insulating capability of a hard vacuum. Only under the right
>circumstances can a vacuum be made to pass current. This can be done
>through thermionic emission of electrons from a heated cathode (vacuum
>tubes), or by field emission (when the electric field is so great that
>it "rips" electrons from the surface of the cathode).
>
>
>-- Bert --
>
I stand corrected. You are, of course, correct.
Phil
Phil Gantt (pgantt-at-ix-dot-netcom-dot-com)
http://www-dot-netcom-dot-com/~pgantt/intro.html