Last Link of the Day: Lenz’s Law at Work

What the heck? How does that work?

Glad you asked. The moving field from the magnet induces eddy currents in the copper, and electrical resistance converts that current to heat. Due to conservation of energy, the heat comes at the expense of the magnets kinetic energy.

And no, I don’t know why the guy demonstrating this is talking about a porn site.

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