ohm

ohm

[ohm]
noun
the standard unit of electrical resistance in the International System of Units (SI), formally defined to be the electrical resistance between two points of a conductor when a constant potential difference applied between these points produces in this conductor a current of one ampere. The resistance in ohms is numerically equal to the magnitude of the potential difference. Symbol: Ω

Origin:
1861; named after G. S. Ohm

ohmic [oh-mik] , adjective
Dictionary.com Unabridged

Ohm

[ohm]
noun
Georg Simon [gey-awrk zee-mawn] , 1787–1854, German physicist.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
ohm (əʊm)
 
n
Ω the derived SI unit of electrical resistance; the resistance between two points on a conductor when a constant potential difference of 1 volt between them produces a current of 1 ampere
 
[C19: named after Georg Simon Ohm]

Ohm (əʊm)
 
n
Georg Simon (ˈɡeːɔrk ˈziːmɔn). 1787--1854, German physicist, who formulated the law named after him

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

ohm
"unit of electrical resistance," 1867, in allusion to Ger. physicist Georg S. Ohm (1789-1854), who determined the law of the flow of electricity. Originally proposed as ohma (1861) as a unit of voltage. Related: ohmage.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ohm (ōm)
n.
Symbol Ω
A unit of electrical resistance equal to that of a conductor in which a current of one ampere is produced by a potential of one volt across its terminals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
ohm   (ōm)  Pronunciation Key 
The SI derived unit used to measure the electrical resistance of a material or an electrical device. One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it.
Ohm, Georg Simon 1789-1854.  
German physicist who discovered the relationship between voltage, current, and resistance in an electrical circuit, now known as Ohm's law. The ohm unit of electrical resistance is named for him.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
ohm [(ohm)]

The unit of electrical resistance, named after the nineteenth-century German physicist Georg Ohm.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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FOLDOC
Computing Dictionary

Ohm definition

unit
The MKS unit of electrical resistance. One Ohm is the resistance of a conductor across which a potential difference of one Volt produces a current of one Ampere. Named after Georg Simon Ohm.
(2003-12-02)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Encyclopedia Britannica
Encyclopedia

ohm

abbreviation Omega, unit of electrical resistance in the metre-kilogram-second system, named in honour of the 19th-century German physicist Georg Simon Ohm. It is equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere (1Omega = 1 V/A); or, the resistance in which one watt of power is dissipated when one ampere flows through it. Ohm's law (q.v.) states that resistance equals the ratio of the potential difference to current, and the ohm, volt, and ampere are the respective fundamental units used universally for expressing quantities.

Learn more about ohm with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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