Re: A question about capacitor

"aman" <aman.bindra@xxxxxxxxx> wrote in message
news:1114272913.501494.238310@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> When I think of capacitor I can see there are two conducting parallel
> plates seperated by an insulator dielectric. So as there are opposite
> charges on the inside of the plates they attract each other thus
> containing the charge.

Two plates is the minimum, often exceeded.

> Here is my question. If there is a perfect insulator used as
> dielectric, does it mean that the charge is fully contained and if the
> dielectric material gets a little conducting the charge on the plates
> gets reduced(cannot be retained fully) and some charge flows in the
> dielectric. Am I correct to some extent ?

Yes, although what would be called the charge is fully
contained whether the dielectric conducts or not.

> I am asking this because I am constructing a kind of capacitor detector
> which is seperated by dielectric which is water(different kind of
> samples with different conductivity and am trying to nuetralise the
> harmful free ions in water).

If you know your chemistry, you know that water
becomes something like an insulator when you
get the free ion concentration low enough. Are
you using leakage to guage that concentration?
The capacitance will stay just about the same
unless you have very high impurity levels.

--
--Larry Brasfield
email: donotspam_larry_brasfield@xxxxxxxxxxx
Above views may belong only to me.


.

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