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Of electricity that is alternating, especially when obtained from an induction coil. Named after Michael Faraday who built the first electromagnetic generator. [1] galvanic Of electricity that is not alternating. Named after Luigi Galvani. [2] voltaic Of electricity derived from an electrochemical cell or battery.
Today the vast majority of publications no longer refer to electricity as meaning electric charge. Instead they speak of electricity as electromagnetic energy. The definition has drifted even further, and many authors now use the word electricity to mean electric current , energy flow , electrical potential , or electric force. Others refer to ...
Electricity is a very convenient way to transfer energy, and it has been adapted to a huge, and growing, number of uses. [75] The invention of a practical incandescent light bulb in the 1870s led to lighting becoming one of the first publicly available applications of electrical power.
It was the first respectable claim for that law, out of which came the development of a mathematical theory of static electricity." [7] The book contains an account of the kite experiment of Benjamin Franklin, that has been taken as authoritative. Some details not found elsewhere are presumed to have been communicated by Franklin. [8]
The discovery of the principle of the reversibility of the dynamo electric machine (variously attributed to Walenn 1860; Pacinotti 1864; Fontaine, Gramme 1873; Deprez 1881, and others) whereby it may be used as an electric motor or as a generator of electricity has been termed one of the greatest discoveries of the 19th century. [11]
Streetcars created enormous demand for early electricity. This Siemens Tram from 1884 required 500 V direct current, which was typical. Much of early electricity was direct current, which could not easily be increased or decreased in voltage either for long-distance transmission or for sharing a common line to be used with multiple types of electric devices.
Friction is the least-used of the six methods of producing energy. If a cloth rubs against an object, the object will display an effect called friction electricity. The object becomes charged due to the rubbing process, and now possesses an static electrical charge, hence it is also called static electricity. There are two main types of ...
Electricity is a "sticky" form of energy, in that it tends to stay in the continent or island where it is produced. It is also multi-sourced; if one source suffers a shortage, electricity can be produced from other sources, including renewable sources. As a result, in the long term it is a relatively resilient means of energy transmission. [41]