- 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
- On His Majesty's Service; On Her Majesty's Service.
Examples from the Web for ohms
Historical Examples of ohms
The resistance of the secondary wire should be from 100 to 150 ohms.
The separate resistances of two incandescent lamps are 200 ohms and 70 ohms.
What current will flow in the circuit if the external resistance is 2.5 ohms?
How far away is the break in the wire if the latter has a resistance of 80 ohms to the mile?
A pair of magnets of about 50 ohms are mounted on this support.The Boy Mechanic, Book 2
- On Her (or His) Majesty's Service
- 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 for ohm
- Georg Simon (ˈɡeːɔrk ˈziːmɔn). 1787–1854, German physicist, who formulated the law named after him
Word Origin and History for ohms
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.
- 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 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 unit of electrical resistance, named after the nineteenth-century German physicist Georg Ohm.