Re: Teaching Magnetism

[Larry Cartwright <exit60@CABLESPEED.COM>]

Herbert H Gottlieb wrote:
> Also, it is easy to make a re-magnetiser to recharge weak
> permanent magnets or to make new magnets from bars of iron,
> steel, or alnico.
>
> One can be made in a few minutes using a long length of insulated
> wire, a tiny piece of aluminum foil and an ordinary electric plug
> that can be inserted into your wall socket.

OK, you've definitely got my attention, Herb.  Can you post the
construction details for us?  I'm on pins and noodles waiting to find
out about the role of the tiny piece of foil.

At first hearing, I would have been guessing (incorrectly it seems) that
you were describing a DE-magnetizer since it uses AC current.

Thanks and best wishes,

Larry

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Larry Cartwright                    Retired Physics Teacher
<exit60@cablespeed.com>              Charlotte MI 48813 USA
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- Good judgment comes from experience,
  and a lot of that comes from bad judgment.
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