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- He created the first alternating current induction electric motor and many other electrical devices such as the so-called Tesla assembly
- Tesla founded an electrotechnical research laboratory in New York, where he discovered the principle of the rotating magnetic field and polyphase alternating current systems. He created the first alternating current induction electric motor and many other electrical devices such as the so-called Tesla assembly, a radio
- frequency transformer in which primary and secondary are tuned, useful when preselecting the input of a radio receiver.
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