Voltage versus current characteristics for neon gas at 1 Torr pressure between flat electrodes spaced 50 cm. A-D dark discharge A-B: non-self-sustaining discharge and collection of spontaneously generated ions. B-D: the Townsend region, where the cascade multiplication of carriers takes place. D-I glow discharge D-E: transition to a glow discharge, breakdown of the gas. E-G: transition to a normal glow; in the regions around G, voltage is nearly constant for varying current. G-I: represents abnormal glow, as current density rises I-K arc discharge.
Electric discharges can convey substantial energy to the electrodes at the ends of the discharge. A spark gap is used in internal combustion engines to ignite the fuel/air mixture on every power stroke. Spark gaps are also used to switch heavy currents in a Marx generator and to protect electrical apparatus. In electric discharge machining, multiple tiny electric arcs erode a conductive workpiece to a finished shape. Arc welding is used to assemble heavy steel structures, where the base metal is heated to melting by the arc's heat. An electric arc furnace sustains arc currents of tens of thousands of amperes and is used for steelmaking and the production of alloys and other products.
^American Geophysical Union, National Research Council (U.S.). Geophysics Study Committee (1986) The earth's electrical environment. National Academy Press, Washington, DC, p. 263. ISBN9780309036801
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electric, discharge, electromagnetism, electric, discharge, release, transmission, electricity, applied, electric, field, through, medium, such, outgoing, flow, electric, current, through, metal, medium, voltage, versus, current, characteristics, neon, torr, p. In electromagnetism an electric discharge is the release and transmission of electricity in an applied electric field through a medium such as a gas i e an outgoing flow of electric current through a non metal medium 1 Voltage versus current characteristics for neon gas at 1 Torr pressure between flat electrodes spaced 50 cm A D dark discharge A B non self sustaining discharge and collection of spontaneously generated ions B D the Townsend region where the cascade multiplication of carriers takes place D I glow discharge D E transition to a glow discharge breakdown of the gas E G transition to a normal glow in the regions around G voltage is nearly constant for varying current G I represents abnormal glow as current density rises I K arc discharge Contents 1 Applications 2 Examples 3 See also 4 ReferencesApplications editThe properties and effects of electric discharges are useful over a wide range of magnitudes Tiny pulses of current are used to detect ionizing radiation in a Geiger Muller tube A low steady current can illustrate the gas spectrum in a gas filled tube A neon lamp is an example of a gas discharge lamp useful both for illumination and as a voltage regulator A flashtube generates a short pulse of intense light useful for photography by sending a heavy current through a gas arc discharge Corona discharges are used in photocopiers Electric discharges can convey substantial energy to the electrodes at the ends of the discharge A spark gap is used in internal combustion engines to ignite the fuel air mixture on every power stroke Spark gaps are also used to switch heavy currents in a Marx generator and to protect electrical apparatus In electric discharge machining multiple tiny electric arcs erode a conductive workpiece to a finished shape Arc welding is used to assemble heavy steel structures where the base metal is heated to melting by the arc s heat An electric arc furnace sustains arc currents of tens of thousands of amperes and is used for steelmaking and the production of alloys and other products Examples editExamples of electric discharge phenomena include Brush discharge Dielectric barrier discharge Corona discharge Electric glow discharge Electric arc Electrostatic discharge Electric discharge in gases Leader spark Partial discharge Streamer discharge Vacuum arc Townsend discharge St Elmo s fire Lightning Electric organSee also editDebye sheath Electrical breakdown Electric discharge in gases Lichtenberg figure Space chargeReferences edit American Geophysical Union National Research Council U S Geophysics Study Committee 1986 The earth s electrical environment National Academy Press Washington DC p 263 ISBN 9780309036801 nbsp This plasma physics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Electric discharge amp oldid 1198600569, wikipedia, wiki, book, books, library,
