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At 02:50 PM 6/5/00 -0700, James Paul wrote:
> All,
>
> Capacitors exhibit reactance when excited by alternating current.
> This reactance opposes changes in voltage.   If the capacitance
> value remains constant, and frequency is increased, the amount of
> this reactance goes down.

Unfortunately, real capacitors also have a series inductance and resistance.
The R remains constant, but the inductive reactance rises with frequency.

Given that there is Xc and Xl, you can easily see that there will be a
frequency of minimum impedance for any given construction and value.

The values I gave are from direct measurement.

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