Video: "World's Simplest Electric Train"

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That is super cool.

So the magnets on the end of the battery touch the wire, creating a circuit through the coil right where the train is. This circuit induces a thrust on the magnets.

With so few turns right around the train, and many of them probably touching and shorting out, I’m amazed it can generate enough thrust to push the thing. Presumably the initial push is necessary to get it to overcome friction.

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