ampere


ampere
/am"pear, am pear"/, n. Elect.
the base SI unit of electrical current, equivalent to one coulomb per second, formally defined to be the constant current which if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed one meter apart in vacuum, would produce between these conductors a force equal to 2 × 10-7 newton per meter of length. Abbr.: A, amp.
Also, ampère.
[1881; named after A. M. AMPÈRE]

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▪ unit of measurement
      unit of electric current in the Système International d'Unités (SI), used by both scientists and technologists. Since 1948 the ampere has been defined as the constant current which, if maintained in two straight parallel conductors of infinite length of negligible circular cross section and placed one metre apart in a vacuum, would produce between these conductors a force equal to 2 × 10-7 newton per metre of length. Named for the 19th-century French physicist André-Marie Ampère, it represents a flow of one coulomb of electricity per second. A flow of one ampere is produced in a resistance of one ohm by a potential difference of one volt. See electric current.

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Universalium. 2010.

Look at other dictionaries:

  • ampère — [ ɑ̃pɛr ] n. m. • 1865; de Ampère, nom d un physicien ♦ Unité d intensité des courants électriques, qui correspond à un écoulement de un coulomb par seconde dans un conducteur (symb. A). Ampère par mètre (symb. A/m) :unité d intensité de champ… …   Encyclopédie Universelle

  • AMPÈRE (A.-M.) — Dans l’effort continu de l’homme pour dominer la matière, capter son énergie, interpréter ses manifestations et les utiliser, des noms illustres émergent à qui nous sommes redevables de toute cette transformation. Dans la multitude de savants,… …   Encyclopédie Universelle

  • Ampere — Ampère Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Ampère peut désigner : André Marie Ampère (1775 1836), physicien français. Son nom a été donné à : l’ampère, unité SI d’intensité d’un… …   Wikipédia en Français

  • Ampere —     André Marie Ampère     † Catholic Encyclopedia ► André Marie Ampère     Physicist and mathematician, b. 22 January, 1775, at Lyons, France; d. at Marseilles, 10 June, 1836. His father was a prosperous and educated merchant, his mother… …   Catholic encyclopedia

  • Ampère — can refer to: *Ampère (car) *Ampere (unit) *André Marie Ampère, one of the main discoverers of electromagnetism *Ampere (band) …   Wikipedia

  • Ampère — ampere (de «A. M. Ampère», físico francés) m. Fís. Amperio, en la nomenclatura internacional. * * * ampere. (De A. M. Ampère, 1775 1836, matemático y físico francés). m. Fís. amperio. * * * …   Enciclopedia Universal

  • Ampère — (Париж,Франция) Категория отеля: 4 звездочный отель Адрес: 102 Avenue de Villiers, 17 й округ …   Каталог отелей

  • Ampère — (spr. angpǟr ), 1) André Marie, Physiker und Mathematiker, geb. 22. Jan. 1775 in Lyon, gest. 10. Juni 1836 in Marseille, studierte Chemie und Physik, erhielt 1801 eine Professur in Bourg, ging von dort nach Lyon und 1805 nach Paris und ward 1809… …   Meyers Großes Konversations-Lexikon

  • ampere — (de «A. M. Ampère», físico francés) m. Fís. Amperio, en la nomenclatura internacional. * * * ampere. (De A. M. Ampère, 1775 1836, matemático y físico francés). m. Fís. amperio. * * * ► masculino METR …   Enciclopedia Universal

  • ampere — (n.) 1881, the current that one volt can send through one ohm, from Fr. ampère, named for French physicist André Marie Ampère (1775 1836). Shortened form amp is attested from 1886 …   Etymology dictionary

  • Ampere — Am p[ e]re ([aum]N p[^a]r ), Ampere Am*pere ([a^]m*p[=a]r ), n. [From the name of a French electrician.] (Elec.) The unit of electric current; defined by the International Electrical Congress in 1893 and by U. S. Statute as, one tenth of the unit …   The Collaborative International Dictionary of English


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