DIY Homopolar Motor

This looks like fun: make your own homopolar motor made from only a battery, a magnet and a copper wire!

See it in action: Link (embedded YouTube) | More info at Dangerously Fun | Homopolar Motor in Wikipedia

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I thought I might be homopolarphobic, but I watched the entire movie without flinching once - in fact I enjoyed it.

//but now after admitting it, I feel kind of dirty.
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