I wonder whether there is a quantitative description of this phenomenon. specifically a formula for the speed of the magnet.
Lenz's Law ('Magnetic Braking') is one of my favorite physical phenomena •The moving magnet induces a current in the pipe •This current creates another magnetic field, opposite to the direction of the falling magnet! (Note: the pipe is not magnetized !!)pic.twitter.com/2QBycVNOky
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indeed there is .. i can post it
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Me rn trying to find the direction of induced current
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In the video the magnet is tumbling. Does it not depend on the orientation of the falling magnet?
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great question .. in principle it ought to since it changes the flux! The only case we would expect it to not is if the B-field is approximately isotropic.. i haven't worked it out entirely, but there's a paper i linked somewhere else in the comments
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We have a 1 meter long thick wall copper tube. The magnet takes 29 seconds to fall through.https://youtu.be/2dqQyV-evK0
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It’s literally magic. I’ve been researching it. I’m obsessed. Thanks for sharing.
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Nothing captured my physics class’ attention more!
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Works nicely with 1 m of copper or aluminium plumbing pipe from B and Q and only costs about £5. Certainly in my top 5 physics pracs
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