On 11/27/2014 11:39 AM, drlegendre . wrote:
The lack of heating in your antimagnetic stainless or copper cookware isn't
due to a lack of ferromagnetic content - it's a different situation
entirely. The issue stems from the electrical properties of the bulk
material - in essence, those pots are +too good+ of a conductor at the
frequencies in use. The currents flow in a deep, thick layer and encounter
trivial resistance. It's this lack of resistance that's responsible for the
lack of heat production .
I'm sure you've seen the well-known 'magnet down the copper pipe'
demonstration, which shows clearly that eddy currents develop just fine in
copper - which certainly isn't in the ferromagnetic series. As for glass or
ceramic, they're electrical insulators, so there's little to zero current
flow at all, and again, no heat production.
This goes counter to my experience. Any utensil that passes the "magnet
test" will work; any that don't, don't.
I've never found an exception to this.