How the battery was invented

1. Luigi Galvani was a professor of Physics at Bologna University.

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2. When Galvani touched a dead frog's body with a piece of glass, its legs jumped.

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3. Galvani believed that the electric current was generated by the iron hooks.

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4. Volta didn't believe that electric current was generated by the frog's body.

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5. Volta's "sandwich" was made using copper and zinc discs.

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6. Between discs Volta placed lemon juice.

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7. Volta had to make a pile of these sandwiches to increase the current.

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8. Volta's battery was the first device which could produce alternating current.

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