electrode


electrode
/i lek"trohd/, n. Elect.
a conductor, not necessarily metallic, through which a current enters or leaves a nonmetallic medium, as an electrolytic cell, arc generator, vacuum tube, or gaseous discharge tube.
[1825-35; ELECTR- + -ODE2]

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Electric conductor, usually metal, used as one of two terminals to conduct electric current through a conducting medium.

A simple voltaic cell, or battery, consists of two electrodes, usually one zinc and one copper, immersed in an electrolytic solution (see electrolyte). When a chemical reaction occurs in the solution, electrons gather on the zinc electrode, or cathode, which becomes negatively charged. At the same time, electrons are drawn from the copper electrode, the anode, giving it a positive charge. The difference in charge sets up a potential difference, or voltage, between the two electrodes. When they are connected by a conducting wire, electrons flow from the cathode to the anode, producing a current.

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      electric conductor, usually metal, used as either of the two terminals of an electrically conducting medium; it conducts current into and out of the medium, which may be an electrolytic solution as in a storage battery, or a solid, gas, or vacuum. The electrode from which electrons emerge is called the cathode and is designated as negative; the electrode that receives electrons is called the anode and is designated as positive. In an electron tube, the anode is called the plate, and conducting elements that regulate the electron flow inside the tube are also called electrodes.

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Universalium. 2010.

Look at other dictionaries:

  • électrode — [ elɛktrɔd ] n. f. • 1836; angl. electrode (1834); de electric et ode 1 ♦ Électr. Conducteur par lequel le courant arrive ou sort dans un électrolyte, un tube à gaz raréfié et, en général, un milieu où il doit être utilisé. Électrode positive. ⇒… …   Encyclopédie Universelle

  • Electrode — Électrode La pile de Volta : le zinc à l anode est consommé en libérant des électrons qui alimentent le circuit électrique. Une électrode est un conducteur métallique, ou ionique (ex. verre) relié à une demi pile ou faisant partie d une demi …   Wikipédia en Français

  • Electrode — E*lec trode ([ e]*l[e^]k tr[=o]d), n. [Electro + Gr. odo s way, path: cf. F. [ e]lectrode.] (Elec.) a conducting object by which electricity is conveyed into or from a solution or other non metallic conducting medium; esp., the ends of the wires… …   The Collaborative International Dictionary of English

  • Electrode — сингл солиста группы ТОЛ, The Obolon Bastardz, Гаплык. Трек лист: Електрод 4:26 Порушити закон 5:18 Торба (вместе с «Гаплик») 3:53 Чорний дощ (вместе с Василий Переверзев (Prozorow) (ТОЛ)) 5:56 Оззі, будь ласка не вбивай 3:06 Вихід? 4:49 Біти… …   Википедия

  • Electrode — Electrode. См. Электрод. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • electrode — 1834, coined by English physicist and chemist Michael Faraday (1791 1867) from ELECTRO (Cf. electro ) + Gk. hodos way (see CEDE (Cf. cede)) on same pattern as ANODE (Cf. anode), CATHODE (Cf. cathode) …   Etymology dictionary

  • electrode — ► NOUN ▪ a conductor through which electricity enters or leaves something. ORIGIN from ELECTRIC(Cf. ↑electrically) + Greek hodos way , on the pattern of anode and cathode …   English terms dictionary

  • electrode — [ē lek′trōd΄, ilek′trōd΄] n. [ ELECTR(O) + ODE1] any terminal that conducts an electric current into or away from various conducting substances in a circuit, as the anode or cathode in a battery or the carbons in an arc lamp, or that emits,… …   English World dictionary

  • Electrode — For other uses, see Electrode (disambiguation). Electrodes used in arc welding An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte or a …   Wikipedia

  • electrode — [1] In a spark plug one electrode (the center electrode) is the center rod passing through the insulator. The side electrode is a rod welded to the shell of the spark plug. The distance between them is the spark gap. [2] In welding it is the… …   Dictionary of automotive terms

  • Électrode — La pile de Volta : le zinc à l anode est consommé en libérant des électrons qui alimentent le circuit électrique. Une électrode est un conducteur électronique, ou ionique (ex. verre) relié à une demi pile ou faisant partie d une demi pile,… …   Wikipédia en Français


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