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Wednesday
May272009

Magnet Falling in a Copper Pipe

DateWednesday, May 27, 2009 at 01:17PM

Not me in the video, by the way.

Eddy currents. The magnet falls far slower than you'd expect because it generates electricity in the pipe as it falls. That electricity then generates a magnetic field in opposition to the magnet's field slowing the fall. Coolmagnetman has a good site expaining what is happening and a couple of cool experiments to try with it.

Bill Beaty's (my hero!) has lots of cool stuff about rare earth magnets here including excellent plans and sources for pipe.

AuthorKossover, Zeke | Comment1 Comment | Reference4 References |
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