Ya, but don't call it AC in this context if you want clarity...
Call it polarity switching or very low frequency AC.

For higher frequency AC, just try putting a diode in line.
You'll have pulsed DC

Dan

On Sat, Dec 12, 2009 at 6:10 AM, Ode Coyote <odecoy...@windstream.net> wrote:
>
>
>  DC that you have to switch polarity on every minute or so, IS ....AC.
>  You're just Alternating the Current slower than 50- 60 times a second and
> it's Square wave, not Sine wave AC.
>
>  Voltage controls ion velocity.
>  At a high frequency AC, voltage has to be very high so the Ions can get
> away from the electrode fast and far enough, so the polarity change doesn't
> just suck them back on.
>
>  ...at 60 Hz, that's somewhere around 5 to 20 kilovolts..VERY dangerous... a
> careless heart stopper.
>
> ode
>
>
> At 10:19 AM 12/11/2009 -0800, you wrote:
>>
>> Which do you think works better for making EIS, DC that you have to switch
>> polarity on every minute or so, or AC, assuming everything else is equal?
>>
>> Dick
>
>
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