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The telephone was invented.

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The telegraph was invented.

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He discovered that currents flow due to the change in magnetism.

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He published the first book about making steel magnets.

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A description of the compass is talked about for the first time.

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Alessandro Volta invented the battery (he caled it a Votalic pile).

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He discovered that magnetism can be produced by electricity in motion (known as electromagnetic induction).

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Physics - Understanding Electromagnetic induction (EMI) and electromagnetic force (EMF) - Physics.mp4

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Ampere published his book, “Memoir on the Mathematical Theory of Electrodynamic Phenomena, Uniquely Deduced from Experience." This was about electromagnetism.

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He gave the first detailed description of a compass.

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He revealed his invention of the electromagnet

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Oersted started looking at the relationship between electricity and magnetism. He discovered this by accident when he put a compass near a wire with current flowing through it and realized that the compass acted as if the wire was a magnet.

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Gilbert discovered that not only could magnets could be made out of iron, but also that the earth was a gigantic magnet. He also discovered that if you heat up a magnet hot enough, you could demagnetize it.

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Magnes discovered the first ever recorded lodestone when he discovered that the nail holding his shoe together stuck to the rock the lodestone was underneath.