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# Electro magnet

- To: <femm@yahoogroups.com>
- Subject: Electro magnet
- From: "Eric Vogels" <eric.vogels@telia.com>
- Date: Mon, 30 Jun 2003 21:53:35 +0200
- References: <20030629091248.75685.qmail@web20209.mail.yahoo.com>

Dear all. I'm not sure my question fits in this forum. If not, the moderator may remove it. My question is: I have no knowledge about electro magnets but I want to design an electro magnet that operates without an iron (or any magnetic material) core. I hope that is possible. As power I have 3 Volt,3.6 Watt (from a bicycle dynamo). How do I calculate the strongest electro magnet (wire thickness, coil diameter, coil size, number of turns). Thanks in advance. Eric Vogels.

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