Dear rambotrout:
On Jun 12, 11:53=A0am, rambotrout <rambotr...@[EMAIL PROTECTED]
> wrote:
> If two electrodes are sandwitching two dielectric
> materials with very different dielectric constants
> (but the same thickness), say, water and glass.
=2E.. better, air and glass.
> Would the new dielectric constant lies in
> between the original two?
Yes. Over the total separation.
> What would be the electric field in between the
> dielectric materials?
No change, I think. The electric field is impressed by the charge on
the plates. The amount of energy involved in impressing that
particular field, that is something else again.
> I suppose not half of the total electric field
> imposed by the electrodes. Would the larger
> dielectric constant material take up more
> of it?
The dielectric controls the current that will flow for a given applied
voltage.
> If the water contains ions, would that change
> its dielectric constant from that of its pure
> form (about 80)?
No, it controls its "leakage" or resistivity.
> Is there any relation between dielectric
> constant and dielectric strength?
Not really, or at least not directly.
http://www.ami.ac.uk/courses/topics/0184_dp/index.html
http://en.wikipedia.org/wiki/Dielectric_strength
http://en.wikipedia.org/wiki/Dielectric_constant
Dielectric strength has to do with the strength of the weakest bond.
Dielectric constant has to do with how polar an atom or molecule is.
David A. Smith
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