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Re: Bert Pools Formula for Capacitance of a Toroid



In a message dated 96-03-07 13:25:37 EST, you write:

>Greetings,
>
>   I would appreciate it if someone could clarify the numerator of the
>radicand in Bert Pools formula for the capacitance of a Toroid?  I have
>downloaded it in two different files, and it always seems to have been
>rearranged when it arrives.
>
>   The part of the numerator that I am not entirely sure of appears to be
>(2pi)^2.  If this is so, then the radicand could be simplified.
>
>   Any comments would be appreciated.
>
>
>                                    Jim Watson

Jim,

The formula under the square root sign should read:

2 pi^2 (d1-d2) (d2/2) all divided by 4 pi.

I agree, it can be reduced to:  pi (d1-d2) (d2/2) all divided by 2.

Ed Sonderman