Mike,
The Electric Field is a result of the charge difference on the two plates, simular to the Magnetic field between N and S magnetic poles.
A magnetic field is the attraction between a N pole and a S pole.
An electric field is the attraction between a + charge and a - charge.
This discussion can continue with many oppinions for as long as you all want, but it doesn't change the facts of physics - the charge is on the plates - the field is between the plates and since the dielectric is also between the plates, the field is then in/through the dielectric. This is not my oppinion - this is the facts of physics. If you don't believe me, then go get a physics/electronics book and prove me wrong. Oppinions have little bearing on known physical LAWS.
If this message is taken as being harsh, then you are free to remove me from the list. I am willing to spend my time on those who want and are willing to learn - not on those that won't.
Doug
Doug
d nixon wrote:
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Sunantoro,
I'm not so sure this is the case. I'm now leaning towards no electrons stored on the plates, but the "charge" is stored in the field, which is then able to induce a current in the plates when it collapses (when it is "discharged".
-Mike
From: Sunantoro <SUNANTORO@...>
Reply-To: Electronics_101@...
To: "'Electronics_101@...'" <Electronics_101@...>
Subject: RE: [Electronics_101] Capacitor - Charge- Energy
Date: Tue, 30 Oct 2001 11:18:04 +0700
Jim,
When we charge a capacitor, we actually pull-out the electrons from one
plate and at the same time provide more electrons on the other plate. And
then we disconnect the capacitor. The capacitor is now charged. If then we
connect the two leads, using a resistor, the electrons flow from the
excessed electrons plate to the other. Then the capacitor is being
discharged.
Very easy to explain and to analyse.
In most electrical circuitry, this conventional approach is still good to be
used.
Am I too "FLAT"?
Thanks,
SUNAN
-----Original Message-----
From: Jim Purcell [SMTP:jpurcell@...]
Sent: Tuesday, October 30, 2001 10:53 AM
To: Electronics_101@...
Subject: Re: [Electronics_101] Capacitor - Charge- Energy
Sunantoro,
> When people discuss about capacitor, they use "Charge" and
"Energy"
> interchangeably. This is rather confusing or ambiguous
(to me).
> Can we simply change it with "Electrons" which flow and
accumulate in one
> plate when the opposite plate becomes lack of it
(electrons)?
Don't think any electrons accumulate on the plates. Where would they
stay. I'm thinking now that charge is the wrong term to use for the
resulting stored energy. We often say that a capacitor stores a charge, and
it certainly has to be charged, and the text books talk coulombs something
fierce when they get to capacitors. I still can't see the energy in a cap as
stored electrons, that's particles. And fields are not supposed to be
particles, or am I wrong there too.
>
> By using this understanding, I believe there is no need to
elaborate further
> on "Charge" or "Energy",
Actually, I have a problem with the term energy to describe what is
stored too since energy includes time, i.e. watt seconds, joules. But the
stored energy is at rest. OR are we talking about the amount of joules it
took to charge... oops, to store the energy.
Jim
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