Nikola Tesla (1856-1943), Serb-US physicist, seated in front of the spiral secondary coil of a high frequency transformer in his New York laboratory.
Nikola Tesla (1856-1943), Serb-US physicist, seated in front of the spiral secondary coil of a high frequency transformer in his New York laboratory. In 1884 Tesla emigrated to America. For a while he worked with Edison, but after advocating alternating current (AC) over Edison's preferred (and financially lucrative) direct current (DC), they parted. Tesla then developed the AC induction motor and improved AC generation. Alternating current, since it can be easily transformed up and down, is far easier to distribute than DC. Later Tesla invented an air-core transformer which created sparks 40 metres long. In 1899 he lit 200 electric lamps over 25 miles without wires. The SI unit of magnetic flux density is named after him.
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Photo credit: © NIKOLA TESLA MUSEUM/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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