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p. 243. Electrical current and the path to powerlocked

  • Stephan Blundell

Abstract

‘Electrical current and the path to power’ describes the early connections between electricity and magnetism, which came from a series of decisive experiments. Luigi Galvani's work in the 18th century on frogs indicated animal electricity and that lightning in thunderstorms was electrical. The physicist Alessandro Volta created voltaic cells, now called batteries, which replaced the simple Leyden jar. In 1820, Hans Christian Oersted identified that a current produces a magnetic field and this led André-Marie Ampère in his work on electrodynamics. Michael Faraday went on to produce the first motor and discover electromagnetic induction. Finally, Nikola Tesla's work on practical electrical power distribution through alternating current (AC) rather than direct current (DC) is discussed.

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