Re: a frequency-variable resistor Re: request for braid d

To: tesla-at-pupman-dot-com
Subject: Re: a frequency-variable resistor Re: request for braid d
From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Tue, 11 May 1999 18:54:18 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

> Original Poster: Wells Campbell <wellscampbell-at-erols-dot-com> 
> 
> > Ok, but the skin effect is independent of the voltage. The reason is
> > more magnetic than electric. Parallel wires with current in the same
> > direction tend to move apart.
> > 
> > Antonio Carlos M. de Queiroz
> 
> Different skin effects, maybe? I have never heard of magnetic field
> repulsion as the reason for the skin effect, but that doesn't mean it's
> not the case :-) I am not as familiar with higher frequency phenomena,
> but the skin effect which I studied was in electrostatic context (hair
> standing on end, Van de Graaf generator) which would not produce
> magnetic fields at all. There is no use arguing about facts, can anyone
> set us straight? See my post on similar topic just a few minutes ago...
> 
> Wells

To the best of my knowledge, Antonio is correct. Skin effect is an AC 
phenomenon. It doesn't just apply at radio frequencies either. I 
think what you are referring to with regard to electrostatics is the 
idea that charge is repelled to the outside of a hollow conductor. 
This is not called skin effect in engineering circles I am familiar 
with.

Malcolm