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Blog post: swansont: More Fun with Lenz's Law

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[youtube:http://www.youtube.com/watch?v=keMpUaoA3Tg]

 

I've linked to videos showing the effect before, but it's still cool. I notice he spins the magnet — that gives an even faster change to the magnetic field, and enhances the braking beyond what simply dropping it would do. I looked at the effect with a coil, by measuring the induced voltage some time back.
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