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ammeter
ammeter Instrument for measuring electric current in amperes. An ammeter is connected in series in a circuit. In the moving-coil type for direct current (DC), the current to be measured passes through a coil suspended in a magnetic field and deflects a needle attached to the coil. In the moving-iron type for both direct and alternating current (AC), current through a fixed coil magnetizes two pieces of soft iron that repel each other and deflect the needle. Digital ammeters are now also commonly used.
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"ammeter." World Encyclopedia. 2005. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "ammeter." World Encyclopedia. 2005. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O142-ammeter.html "ammeter." World Encyclopedia. 2005. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-ammeter.html |
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ammeter
ammeter , instrument used to measure the magnitude of an electric current of several amperes or more. An ammeter is usually combined with a voltmeter and an ohmmeter in a multipurpose instrument. Most ammeters are based on the d'Arsonval galvanometer and are of the analog type, i.e., they give current values that can vary over a continuous range as indicated by a scale and pointer or digital readout. |
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"ammeter." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "ammeter." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-ammeter.html "ammeter." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-ammeter.html |
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ammeter
am·me·ter / ˈa(m)ˌmētər/ • n. an instrument for measuring electric current in amperes. |
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Cite this article
"ammeter." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "ammeter." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-ammeter.html "ammeter." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-ammeter.html |
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ammeter
ammeter
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Cite this article
"ammeter." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "ammeter." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O233-ammeter.html "ammeter." Oxford Dictionary of Rhymes. 2007. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-ammeter.html |
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