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Longman Dictionary of Contemporary English
▪ A 3-phase 15° step-angle variable-reluctance motor has a rated phase current 01 2.0A and a phase winding resistance of 5.0 ohms.
▪ Accuracy is cited both in percent error and as the shortfall in ohms.
▪ Either way it has an output of 100 watts per side into 4 ohms, or 70 watts into 8 ohms.
▪ Finally, there are two 8 ohm speaker outputs, with one being used for the unit's internal driver.
▪ For example, a resistor pack might contain ten of each value in the E12 series from 10 ohms to 10M.
▪ Mr Roberts quotes typical values of capacitor and primary coil resistance of and 0.7 ohm respectively.
▪ Note also that an 8 ohm loudspeaker is needed.
The Collaborative International Dictionary

Ohm \Ohm\ ([=o]m), n. [So called from the German electrician, G. S. Ohm.] (Elec.) 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 amp['e]re. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 10^ 9 units of resistance of the C. G. S. system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14.4521 grams in mass, of a constant cross-sectional area, and of the length of 106.3 centimeters. As thus defined it is called the international ohm.

Ohm's law (Elec.), the statement of the fact that the strength or intensity of an electrical current is directly proportional to the electro-motive force, and inversely proportional to the resistance of the circuit.

Douglas Harper's Etymology Dictionary

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.


n. In the International System of Units, the derived unit of electrical resistance; the electrical resistance of a device across which a potential difference of one volt causes a current of one ampere. Symbol: Ω

  1. n. a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere

  2. German physicist who formulated Ohm's Law (1787-1854) [syn: Georg Simon Ohm]

Ohm (crater)

Ohm is a lunar impact crater that is located on the far side of the Moon. It lies to the south of the crater Comrie, and the satellite crater Comrie K is attached to Ohm's northeastern rim. To the northwest is the larger Shternberg, and to the southwest is Kamerlingh Onnes.

This crater is located at the origin of an extensive ray system that extends for several hundred kilometers across the surrounding lunar terrain. The exterior surface for about 20–30 km is relatively free of the ray material, but beyond that perimeter is a skirt of higher albedo, with streaks extending to the northwest, east-northeast, and southwards. The crater is part of the Copernican System.

The outer rim of Ohm is sharply defined, except at the southern end where the edge is somewhat irregular. The inner surface drops down to an interior blanket of slumped material that slopes down to the floor. The crater lacks a notable central peak.


The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm. Although several empirically derived standard units for expressing electrical resistance were developed in connection with early telegraphy practice, the British Association for the Advancement of Science proposed a unit derived from existing units of mass, length and time and of a convenient size for practical work as early as 1861. The definition of the ohm was revised several times. Today the definition of the ohm is expressed from the quantum Hall effect.

Ohm (river)

The Ohm, the right tributary of the Lahn, is a river in Hesse, Germany, Its total length is 59 km. The Ohm originates in the Vogelsberg Mountains, east of the town Ulrichstein. It flows generally northwest through Ulrichstein, Mücke, Homberg (Ohm), Amöneburg, and Kirchhain. The Ohm joins the Lahn in Cölbe, near Marburg.

Category:Rivers of Hesse 1Ohm

OHM (band)

OHM (sometimes stylized Ohm: or OHM:) is an American instrumental rock/ jazz fusion group fronted by former Megadeth guitarist Chris Poland. The band was formed in 2002 and has released three studio albums and a live album. A similar offshoot band named OHMphrey, also fronted by Poland, was formed in 2008.

The band often perform at the Baked Potato jazz club in Studio City, which is a neighborhood of Los Angeles. On May 21, 2016, drummer Nick Menza died from heart failure while performing on stage with OHM at the Baked Potato jazz club.

Ohm (disambiguation)

Ohm (Ω) refers to the SI unit of electrical resistance named after Georg Ohm.

Ohm may also refer to:

  • Ohm (crater) on the Moon
  • Ohm (river), a river in Germany
  • Ohm, California, a former settlement in the USA
  • Ohm (One Piece), a character featured in the Japanese anime One Piece
  • "Ohm," a song by indie band Yo La Tengo, included on the album Fade
  • Alternative spelling for Om, a mantra and sacred syllable of several Indian religions (in particular Dharma faiths like Hinduism, Jainism, and Buddhism).
  • Alternative spelling for Um (Korean name)
  • Georg Ohm (1789–1854), German physicist
  • Martin Ohm (1792–1872), German mathematician
  • German Ohm, Mexican boxer
  • Johnny Ohm, Marvel Comics supervillain
  • Thorsten Ohm, CEO of VDM Publishing
  • An obsolete unit of volume measurement, less than a litre, used in Prussia, Sweden and Denmark

OHM may refer to:

  • OHM (band), a rock/jazz fusion music group
  • OHM: The Early Gurus of Electronic Music, 2000 album
  • One Hot Minute, the sixth studio album by American alternative rock band Red Hot Chili Peppers
  • Off highway vehicle or Off highway motorcycle
  • Organisatie Hindoe Media, a Dutch public broadcaster
  • OHM ( Observe. Hack. Make.), an outdoor hacker conference that took place in the Netherlands in the summer of 2013.

Usage examples of "ohm".

When Ohm had only a few human robots he got enough astatine from his own banknotes.

Volt, ohm, ampere: might as well be biff, baff, boff, for all the sense it makes.

So it has to force its way through whillions and skillions of ohms of resistance to get through to you at all.

They had discovered the X ray, the cathode ray, the electron, and radioactivity, invented the ohm, the watt, the Kelvin, the joule, the amp, and the little erg.

I can't risk getting most of the way home and then seeing the whole thing go to data heaven because of an oHm drop, or a surge too great for the suppressor to cope with.