Did you know 51| Electricity - Twitch to Switch

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Photo taken from Google-:

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In the 1770's, Galvani studies frog muscles. He notices that sparks of static electricity make the dead frog legs move.
He attaches the frog legs to an iron frame with copper tacks. Something makes the legs twitch by themselves. He wrongly thinks the legs move because of animal electricity.
Later, a person named Volta notices that two different metals with a special liquid between them make electricity. He invents the batte Today, we switch on batteries for portable power.

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