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Hermann von Helmholtz - Iron which is brought near a...
Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet. (Hermann von Helmholtz)

Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet.

Hermann von Helmholtz

Related topics

copper current electrical iron magnet magnetic near spiral steel wire

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