In electricity generation, a generator is a device that converts motive power (mechanical energy) into electrical power for use in an external circuit. Sources of mechanical energy include steam turbines, gas turbines, water turbines, internal combustion engines, wind turbines and even hand cranks. The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientist Michael Faraday. Generators provide nearly all of the power for electric power grids.
invented by John Walker
A match is a tool for starting a fire. Typically, matches are made of small…
invented by Thomas Edison
A phonograph, in its later forms also called a gramophone (as a trademark since…
invented by Nicolaus August Otto
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in…
invented by Fyodor Pirotsky
A tram (also known as a streetcar or trolley in North America) is a train that…
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Inventions that changed the world
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