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<p>[QUOTE=&quot;-jeffB, post: 2733229, member: 27832&quot;]Skin effect is extremely dependent on frequency. I think the <i>only</i> way something like this could be made to work is by using different frequencies and comparing response; it <i>might</i> be possible to infer resistance that way, along with permeability.</p><p><br /></p><p>Getting low enough frequency to penetrate deeply seems like it would require big coins (many turns) or very high current, though. (With fewer turns, you get lower inductance, which generally means higher frequency, or a <i>very</i> big capacitor to support <i>very</i> big currents.)[/QUOTE]</p><p><br /></p>

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