Re: skin depth

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

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 



 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: Peter Lawrence <Peter.Lawrence-at-Sun.COM>
 >  >
 >  > I still find it very odd that apparently no one has done skin depth
calcs
 >  > for cylindrical wire, only for hypothetical infinitely wide infinitely
deep
 >  > flat plane conductors...
 >  >
 >  > Sounds like a good problem for a math-physics type, or even a
 >  > physical-simulation type.
 >  >
 >  > -Pete Lawrence.
 >
 > I suspect that was worked out at least 80 years ago.  Remember that if
 > the skin depty is a small fraction of the circumference of the conductor
 > it will be the same as for a flat plate.
 >
Which, unfortunately, isn't the case for all the "useful" situations....
such is life.. On the other hand, rare is the time, indeed, when you need to
know the Rac:Rdc ratio with any real precision...The flat plate wrapped
around the cylinder is a useful approximation, and a lower bound on the
Rac...