# ohm

[ohm]

- 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 of ohm^{}

First recorded in 1861; named after G. S. Ohm

# O.H.M.S.

- On His Majesty's Service; On Her Majesty's Service.

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for ohms

### Historical Examples

#### The resistance of the secondary wire should be from 100 to 150 ohms.

#### How far away is the break in the wire if the latter has a resistance of 80 ohms to the mile?

PhysicsWillis Eugene Tower

#### What current will flow in the circuit if the external resistance is 2.5 ohms?

PhysicsWillis Eugene Tower

#### The separate resistances of two incandescent lamps are 200 ohms and 70 ohms.

PhysicsWillis Eugene Tower

#### A pair of magnets of about 50 ohms are mounted on this support.

The Boy Mechanic, Book 2Various

# OHMS

- On Her (or His) Majesty's Service

# ohm

- 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 ampereSymbol: Ω

## Word Origin

C19: named after Georg Simon Ohm

# Ohm

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History for ohms

# ohm

### n.

unit of electrical resistance, 1867, in recognition of German 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; ohmic; ohmeter.

Online Etymology Dictionary, © 2010 Douglas Harper

# ohm

(ōm)

*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.

# ohm

[ōm]

- 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.

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

# ohm

[(ohm)]

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

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.