Tesla, Nikola

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Croatian-born US physicist and electrical engineer who invented fluorescent lighting, the Tesla induction motor (1882–87), and the Tesla coil, and developed the alternating current (AC) electrical supply system.

The Tesla coil is an air core transformer with the primary and secondary windings tuned in resonance to produce high-frequency, high-voltage electricity. Using this device, Tesla produced an electric spark 40 m/135 ft long in 1899. He also lit more than 200 lamps over a distance of 40 km/25 mi without the use of intervening wires. Gas-filled tubes are readily energized by high-frequency currents and so lights of this type were easily operated within the field of a large Tesla coil. Tesla soon developed all manner of coils which have since found numerous applications in electrical and electronic devices.

Red recalls the banner of Manas who united the Kyrgyz tribes. The emblem shows a bird's-eye view of a yurt, secured by a lattice of ropes. Effective date: 3 March 1992. >>