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# RE: [femm] nonferrous electromagnets

- To: <femm@yahoogroups.com>
- Subject: RE: [femm] nonferrous electromagnets
- From: "Joe" <jflynn@flynnresearch.net>
- Date: Mon, 11 Feb 2002 19:27:56 -0600
- Importance: Normal
- In-reply-to: <3C6704F7.20382.2ECEAF6@localhost>

    I have not really thought this thru, but it seems that if the electromagnet
    is AC at some given frequency, currents would be induced in a conductive
    material ferrous or not (such as an induction furnace used for smelting
    aluminum). These induced currents would also have a B field, if a second
    conductor has the same frequency in phase with the induced field in the
    conductive material then the two would repel, 180 out of phase they would
    attract. I recall an old experiment where either a copper or aluminum disc
    is placed on top of an electromagnet and when the electromagnet is pulsed
    the disc is repelled from the electromagnet.

    Joe Flynn
    jflynn@flynnresearch.net

    -----Original Message-----
    From: sunshine_80918@yahoo.com [mailto:sunshine_80918@yahoo.com]
    Sent: Sunday, February 10, 2002 10:41 PM
    To: femm@yahoogroups.com
    Subject: [femm] nonferrous electromagnets

    Hi all. Been thinking about a project involving nonferrous
    electromagnets, attracting metal with low electrical resistance like
    copper, alluminum, gold etc... Want to know if anyone here knows
    anything or has any experience with this subject. I have searched
    the archives and found no mention and what I did find did not
    understand much. I have a book on order about how to make one,
    just being impatient and thought someone might know from
    experience. Thanks for your time, Mark

    Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

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