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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I wonder whether there is a quantitative description of this phenomenon. specifically a formula for the speed of the magnet.
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I want to believe it depends, among other parameters, of the conductivity of the pipe. in one extreme, if it were a superconductor the magnet would refuse to enter the pipe. (?) -
yes but there a re certain simiplifying assumptions that give you the basic idea .. here's a paper that does it nicely http://www.msc.univ-paris-diderot.fr/~phyexp/uploads/LaimantParesseux/Tube-Aimant2.pdf …
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