ohm (redirected from Ohm (unit))

ohm (ōm) [for G. S. 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.

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ohm

The unit of measurement of electrical resistance in a material. One ohm is the resistance in a circuit when one volt maintains a current of one amp. The symbol for ohm is the Greek letter omega. See impedance.

Ohm's Law
The equation "R=V/I" is the more streamlined version of the one developed by German physicist Georg Simon Ohm in 1827. Ohm's law applies to materials, such as metal, that maintain a linear relationship between voltage and current.

     Ohm's Law

     Resistance = voltage divided by current
     R = V / I   or   R = E / I


     Ohm's Formulas

     Voltage = current times resistance
     V = I * R   or   E = I * R

     Current = voltage divided by resistance
     I = V / R   or   I = E / R


         V or E = voltage (E=energy)
         I = current in amps (I=intensity)
         R = resistance in ohms


     Electric Power

     Power in watts = voltage times current
     P = V * I

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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 ampere.

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Ohm

Georg Simon . 1787--1854, German physicist, who formulated the law named after him

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ohm [ōm]

(electricity)

The unit of electrical resistance in the rationalized meter-kilogram-second system of units, equal to the resistance through which a current of 1 ampere will flow when there is a potential difference of 1 volt across it. Symbolized Ω.

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(unit)

Ohm - 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.