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Topic: Ampere

In the News (Wed 22 May 13)

 Ampere André-Marie Ampere, the son of a Lyon city official, was born in Polemieux-au-Mont-d'Or, near Lyon. In general Ampere's law is similar to Gauss's Law of electric fields, except for the fact that it deals with magnetic fields, and uses a line integral instead of the surface integral used in Gauss's Law. Formerly, the definition involved the force that was produced between parallel wires carrying a current; still earlier, the ampere was defined as a flow of one coulomb per second, where the coulomb (a quantity of electrical charge) was taken as the basic unit. chem.ch.huji.ac.il /~eugeniik/history/ampere.htm   (3459 words)

 Units: A One ampere is the current which, if it's flowing in these conductors, creates between them a force of 0.2 micronewtons per meter of length. One ampere of current results from a potential distribution of one volt per ohm of resistance, or from a power production rate of one watt per volt of potential. The ampere per meter is also the SI unit of "magnetization" in the sense of magnetic dipole moment per unit volume; in this context 1 A/m = 0.001 emu per cubic centimeter. www.unc.edu /~rowlett/units/dictA.html   (5441 words)

 Highbeam Encyclopedia - Search Results for ampere It is defined as the current in a pair of straight, parallel conductors of infinite length and 1m (39in) apart in a vacuum that produces a force of 2 × 10 −7 newton per metre in their length. The ampere is officially defined as the current in a pair of equally long, parallel, straight wires 1 meter apart that produces a force of 0.0000002... It is the potential difference between two points on a conducting wire carrying a current of one ampere when the power dissipated is one watt. www.encyclopedia.com /SearchResults.aspx?Q=ampere   (757 words)

 Ampere - Wikipedia, the free encyclopedia The ampere (symbol: A) is the SI base unit of electric current. The ampere is defined first (it is a base unit, along with the metre, the second, and the kilogram), without reference to the quantity of charge. The unit of electric charge, the coulomb, is defined in terms of the ampere: one coulomb is the amount of electric charge (formerly quantity of electricity) carried in a current of one ampere flowing for one second. en.wikipedia.org /wiki/Ampere   (703 words)

 Ampere, Andre Marie   (Site not responding. Last check: ) Ampere's most notable achievements were his independent determination (1814) of Avogadro's law and his work from 1820 to 1827 based on Oersted's discovery, announced in 1820, that a magnetic needle moves in the vicinity of an electric current. Ampere succeeded in explaining the latter phenomenon by assuming that an electric current is capable of exciting a magnetic field. Ampere also devised a rule governing the mutual interaction of current-carrying wires (Ampere's law) and produced a definition of the unit of measurement of current flow, now known as the ampere. www.cartage.org.lb /en/themes/Sciences/Physics/Electromagnetism/Magnetostatics/Currentsmagnetism/AndreMarie/AndreMarie.htm   (392 words)

 André-Marie Ampère - Wikipedia, the free encyclopedia The SI unit of measurement of electric current, the ampere, is named after him. Ampère was born in Poleymieux-au-Mont-d'Or, near Lyon, and, as a child prodigy, took a passionate delight in the pursuit of knowledge from his very infancy, and is reported to have worked out long arithmetical sums by means of pebbles and biscuit crumbs before he knew the figures. Ampere's Museum (CNRS) is in Poleymieux-au-Mont-d'or, near Lyon, France en.wikipedia.org /wiki/Andr%C3%A9-Marie_Amp%C3%A8re   (543 words)

 Learn more about Ampere in the online encyclopedia.   (Site not responding. Last check: ) In physics, the ampere (symbol: A, often informally abbreviated to amp) is the SI base unit used to measure electrical currentss. The unit of electric charge, the coulomb, is defined in terms of the ampere: 1 coulomb is the amount of electric charge carried in a current of 1 ampere flowing for 1 second. Due to the difficulty in measuring the force between two conductors, the so called "international ampere" or "statampere" was proposed, defined in terms of deposition rate of silver. www.onlineencyclopedia.org /a/am/ampere.html   (226 words)

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