Dropping a magnet through a copper tube. As the magnet falls it induces a current in the copper pipe. That current creates a magnetic field that opposes the changing field of the falling magnet, resulting in the magnet being repelled (falling more slowly). This is Lenz’s law.
Dropping a magnet through a copper tube. As the magnet falls i…
Jun 28, 2019
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What happens when you drop a magnet inside a copper tube?
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boingboing.net
Lenz’s Law: a strong @feelflux neodymium magnet falls slowly down a thick walled copper tube as though passing through a viscous liquid. Since magnetic fields pass through copper, magneview film reveals the location of the falling dipole magnet. The moving magnetic field from the falling magnet produces electric currents in the copper- these currents then produce magnetic fields that have the opposite polarity to the initial field. So a falling magnet makes the copper pipe briefly into an electr
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A magnet falls slowly through a copper tube due to Lenz’s Law. As it moves, it induces eddy currents in the tube, which create a magnetic field opposing the magnet’s motion. This slows it down, acting like a brake.
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