NikolaTesla (1856-1943) was originally named Nikola Tesla. Born in Smiljan, Croatia, he later joined the American nationality. In his early years, he worked for Continental Edison in Paris, and was transferred to the Edison Electric Research Center in the United States for his creative labor, working with Thomas Edison (1847-1931)****. He invented the AC electric motor.
Later, he started the Tesla Electric Company, engaged in the production of alternators, motors, transformers, and high-frequency technology research, invented a high-frequency generator and a high-frequency transformer. 1893, he used alternating current to make a remarkable performance at the World's Fair held in Chicago, and with the "Tesla Coil" that he made, he proved that alternating current could be used to generate electricity.
In 1889, Tesla realized a high-voltage transmission experiment from Colorado Springs to New York in Columbia, USA. From then on, alternating current began to enter the practical stage. Since then, he also engaged in the development of high-frequency electric medical devices, radio broadcasting, microwave transmission of electricity, television broadcasting and so on.
In recognition of his achievements in realizing 200kV, overhead 57.6m high-voltage power transmission as early as 1896 to 1899, with the making of the famous Tesla coil and the contribution in the alternating current (AC) power system, the International Electrotechnical Society (IETS) decided to use his name as a unit of magnetic susceptibility in his centennial anniversary (1956).
In the International System of Units (SI), the unit of magnetic induction is Tesla, abbreviated as T, with the symbol T, which is the International System of Units derived unit of magnetic flux density or magnetic induction. Perpendicular to the direction of the magnetic field of 1 meter long wire, through the current of 1 amperes, by the magnetic field of the force of 1 newton, the energized wire where the magnetic induction strength is 1 tesla.
The magnetic induction near a general permanent magnet is about 0.4-0.7 Tesla, in the cores of motors and transformers, the magnetic induction can be up to 0.8-1.4 Tesla, and the magnetic induction of strong currents through superconducting materials can be up to 1,000 Tesla, whereas the magnetic induction of the geomagnetic field near the ground is only about 0.5*10's -4th power Tesla.