Ring Launcher - Demonstration

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The ring launcher is used to demonstrate Electromagnetism laws. The ring launcher is composed by a coil, winded around an extremity of a ferromagnetic core, leaving about two thirds protruding. The projectiles are conducting non-ferromagnetic rings.

The Ring launcher was created by Elihu Thomson, as a demonstration of the power of alternating current and high frequency.
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This seems like proof that electric currents actually travel outside of the wire as other videos suggest and not the core of the wire.

MikeHensley-scns
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I can be wrong but i think it's an example of Eddy current experiment where the flux of the metalic ring is changed by the electromagnet and the Eddy current is produced in the ring as the current will oppose the magnet so it jumped. It can be wrong but i think i learnt this in my school this year in alternating currents

vanshsharma