Re: Spheres vs Toroids

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 



 > Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
 >
 > As most of the charge will be located at the outer side of the toroid,
 > a thick toroid has more capacitance than a thin toroid with the same
 > major diameter. A very thin toroid has zero capacitance, but it must
 > be -very- thin.

I interprete thin to mean small minor diameter and not thin conducting
surface.  Also,  I'm presuming that as the minor diameter go to zero and the
toroid/capacitance vanishes, that there is no interconnecting surface that
would normally make connection from the center to the inner surface of the
toroid contributing to your capacitance calculation.  Would this be correct?

Is the distribution of charge on the outer surface of the toroid (for
typical and fixed geometry that we use for TCs) uniform or is there a
guassian like distribution across this outer surface.  Does this
distribution (whatever it is) affect the capacitance calculation?

Gerry R