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<p>[QUOTE=&quot;JustMyType, post: 2682488, member: 78422&quot;]The affect that causes a silver coin to drag against a magnetic field is called eddy current braking.&nbsp; It has nothing to do with the actual metal being attracted to (paramagnetic) or repelled from (diamagnetic) a magnet.&nbsp; Instead it has to do with how electrically conductive the material is.&nbsp; Very conductive materials (silver, copper, aluminum, and superconductors) allow a lot of electrical current to flow when a strong magnet is moved close to them.&nbsp; This causes large eddy currents which causes lots of drag.</p><p><br /></p><p>This is actually the same reason iron core transformers are laminated.&nbsp; And why there is an insulating layer between each of the laminations--so that you don&#039;t generate lots of eddy currents and therefore lots of heat.</p><p><br /></p><p><br /></p><p>No need to worry about scratching your coins when sending them down a magnetic slide.&nbsp; Just put them in a flip or half an airtite, or...anything else you can think of (exercise your creativity).&nbsp; With sufficiently large magnets, the effect will work just fine through a few millimeters of protective plastic and then nothing is rubbing on the surface of the coin.&nbsp; You&#039;re lucky to live in an era with such strong magnets that make so much of modern life possible![/QUOTE]</p><p><br /></p>

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