Nikola Tesla

Nikola Tesla was born in 1856 in Smiljan, then part of the Austrian Empire and now in Croatia, to a family of Serbian origin. After studying engineering at Graz and continuing studies in Prague, he worked in Europe before emigrating to the United States in 1884. In the following years he pursued practical electrical engineering and developed a system of patents and designs for alternating-current (AC) motors and power distribution. The precise birth date is sometimes given as July 9 or July 10 in reference works; the year and birthplace are consistently documented.

Tesla's most consequential contributions centered on polyphase AC systems and the induction motor, which uses a rotating magnetic field to drive a rotor. In 1888, Tesla's AC patents and development work became associated with Westinghouse's electrical enterprise. The Smithsonian's National Museum of American History documents a two-phase Westinghouse induction motor introduced that year, explaining that Tesla developed the motor concept and Westinghouse engineers refined it. This distinction matters: Tesla did not invent alternating current itself. Rather, his inventions and patents helped make practical polyphase motors and AC power systems an important part of electrical engineering.

Tesla developed the resonant high-voltage transformer circuit now known as the Tesla coil in 1891. The device is associated with his experiments in high-frequency electrical currents and became a lasting part of the history of electrical technology. Tesla also gave lectures and demonstrations and explored ideas for wireless communication and the transmission of energy. Some of his ambitious long-distance wireless-power projects did not become practical systems; claims about them should be separated from his well-documented contributions to motors, AC engineering and high-frequency experiments.

Tesla became an internationally known inventor and public lecturer, though his later career included financial setbacks and projects that remained incomplete. He died in New York City in 1943. The unit tesla, used for magnetic flux density in the International System of Units, was named in his honour. UNESCO's Memory of the World programme registered the Nikola Tesla Archive in 2003; the collection includes manuscripts, photographs, scientific materials and patent documentation that illuminate his work and the broader history of electrification.

Tesla's legacy is strongest when described precisely: he was a major contributor to polyphase AC engineering and induction-motor development, not a lone inventor of all modern electrical power. These technologies emerged through the work of many engineers, inventors, manufacturers and institutions. Museum collections and archival records help show how Tesla's ideas were developed, adapted and put into use, while distinguishing documented achievements from later popular myths.