E&M

Lenz' Law Demo
__Equipment:__ 3/4", 5 foot copper pipe, Neodymium Magnets (any copper pipe will work, the thicker the edges the better) __Procedure:__ Prepare students for weird physics. Drop neodymium magnets down pipe. __Explanation:__ Falling magnet generates opposite currents in the tube above and below the magnet. Currents obey Lenz's law and induce a magnetic field which opposes motion. //contributed by Mark Hossler; mhossler@landmark-cs.org//

Magnetic Induction Tube
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Magnetic Index Card
Tape a paper clip behind it! //contributed by N. Milburn//

=**Gauss Rail Gun DIY project**:= =media type="youtube" key="9LtkIcAIQII" height="344" width="425"=