Edison had many inventions in his life. Electric light, telephone, phonograph, etc. , make him enjoy all kinds of honors. Tesla was first employed by Edison. Edison just focused on DC power generation. He doesn't pay attention to Tesla's talent, but is only interested in Tesla helping him improve DC power generation. Tesla invented the world's first alternator. He firmly believes that alternating current will one day make the power supply range wider and the cost lower. Edison shrugged off the idea and was unwilling to seriously consider it. Tesla's weekly salary is 18 USD. When Tesla's request for a salary increase of $25 a week was rejected, he resigned.

Edison invented the electric light, but if the distance between the lighting lamp and the power station in a residential area exceeds 1 km, it can't get enough current to emit strong light, because direct current can't transmit energy over a long distance.

1893 65438+ 10, the Chicago World Expo opened, and more than 90,000 electric lights lit by Tesla alternating current lit up the whole venue. This is a great success. Westinghouse also contracted to build the world's first hydroelectric power station at Niagara Falls. Tesla's alternator won the bid for the hydropower station, which was built at 1895 and can transmit current to Buffalo, 35 kilometers away. This incident finally declared the victory of L Tesla, and Edison ended in a fiasco. Then Edison's General Electric Company had to start alternating current. Later, DC gradually withdrew from the market.