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Re: toroid shaped coil capacitance
From: Norman F. Stanley[SMTP:nfs-at-midcoast-dot-com]
Sent: Sunday, January 04, 1998 1:34 AM
To: Tesla List
Subject: Re: toroid shaped coil capacitance
At 06:57 PM 1/2/98 -0600, you wrote:
>
>From: D.C. Cox[SMTP:DR.RESONANCE-at-next-wave-dot-net]
>Sent: Friday, January 02, 1998 6:37 PM
>To: Tesla List
>Subject: Re: toroid shaped coil capacitance
>
>to: Mark
>
>Do your reference books contain any equations for the "suface area" of both
>a sphere and torus? I'm working on an article for the TCBA and have the
>equations for capacitance but not surface area. Thanks in advance.
>
>DR.RESONANCE-at-next-wave-dot-net
>
It's A=4(pi^2)Rr
where the torus is generated by a circle of radius r rotated about an axis
at a distance R from the center. (Ref. Korn and Korn, Mathematical
Handbook for Scientists and Engineers, McGraw-Hill 1961, p. 749.
Norm