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Electric Arc

Electrical Conduction In Gases, Properties Of The Arc, Uses Of Electric Arcs

An electric arc is a high-current, low-voltage electrical discharge between electrodes in the presence of gases. In an electric arc, electrons are emitted from a heated cathode. Arcs can be formed in high, atmospheric, or low pressures, and in various gases. They have wide uses as highly luminous lamps, as furnaces for heating, cutting and welding, and as tools for spectrochemical analysis.

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Science EncyclopediaScience & Philosophy: Dysprosium to Electrophoresis - Electrophoretic Theory