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Topic: Ohm


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  Ohm
The ohm is the SI derived unit of electrical resistance (derived from the ampere and the watt).
A measurement in ohms is the reciprocal of a measurement in siemens (also called mho, the anagram of ohm), the SI unit of electrical conductance.
Ohms are also used to measure impedance and reactance for complex resistance.
www.brainyencyclopedia.com /encyclopedia/o/oh/ohm.html   (243 words)

  
 Encyclopedia topic: Ohm   (Site not responding. Last check: 2007-10-22)
This article is about the SI (A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors) derived unit.
The reciprocal of the ohm is also called the mho (A unit of conductance equal to the reciprocal of an ohm), from ohm written backwards.
The ohm is since 1990 maintained internationally using the quantum Hall effect (additional info and facts about quantum Hall effect), where a conventional value is used for the 'von-Klitzing (additional info and facts about von-Klitzing) constant', fixed by the 18th CGPM as
www.absoluteastronomy.com /encyclopedia/o/oh/ohm.htm   (407 words)

  
 Georg Ohm - Open Encyclopedia   (Site not responding. Last check: 2007-10-22)
Georg Simon Ohm, (March 16, 1789 - July 6, 1854), German physicist, was born in Erlangen and educated at the university there.
He became professor of mathematics in the Jesuits' college at Cologne in 1817 and in the polytechnic school of Nuremberg in 1833, and in 1852 became professor of experimental physics in the university of Munich, where he later died.
Ohm's name has been incorporated in the terminology of electrical science in Ohm's Law, the proportionality of current and voltage in a resistor, and adopted as the SI unit of resistance, the ohm (symbol Ω).
open-encyclopedia.com /Georg_Ohm   (197 words)

  
 ohm on Encyclopedia.com
ōm [for G. Ohm ], unit of electrical resistance, defined as the resistance in a circuit in which a potential difference of one volt creates a current of one ampere; hence, 1 ohm equals 1 volt/ampere.
The megohm (1,000,000 ohms) and the milliohm (.001 ohm) are units derived from the ohm.
OHM Corporation Reports 4th Qtr EPS of 14 Cents VS 8 Cents in 1995
www.encyclopedia.com /html/o1/ohm.asp   (267 words)

  
 AllRefer.com - Georg Simon Ohm (Physics, Biography) - Encyclopedia
His study of electric current led to his formulation of the law now known as Ohm's law.
The unit of electrical resistance (see ohm) was named for him.
He also made studies in acoustics and in crystal interference.
reference.allrefer.com /encyclopedia/O/Ohm-Geor.html   (171 words)

  
 definition of ohm
The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampere.
As thus defined it is called the international ohm.
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www.brainydictionary.com /words/oh/ohm195966.html   (234 words)

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