The inventions, researches and writings of Nikola Tesla : with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas C, Tesla, Nikola · The Electrical Engineer · leaf 254
being insulated in space . To pro duce rotation it is generally ( but not absolutely ) necessary to connect the free end of the motor coil to an insulated body of some size . The experimenter ’ s body is more than sufficient . If he touches the free terminal with an object held in the hand , a… … Fio . 146 . stead of the experimenter ’ s body , a small metal sheet suspended on a cord may be used with the same result . In this case the plate acts as a condenser in series with the coil . It counteracts the self - induction of the latter and allows a strong current to pass . In such a…
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