17 ene 1891 año - Nikola Tesla Nikola Tesla invented the Tesla coil; the Tesla induction motor; alternating current (AC); electrical supply system that includes a transformer; 3-phase electricity and motor. In 1891, Tesla coil was invented and used in electronic equipment, television and radio sets. The unit of magnetic field density was named after him.
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17 ene 1891 año
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~ 134 years ago