# Ohm definition

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 basic unit of electric resistance in the SI and MKS systems, equal to the resistance of a circuit in which an electromotive force of one volt maintains a current of one ampere.
noun
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 LawThe equation "R=V/I" is the more streamlined version of the one developed by German physicist Georg Simon Ohm in 1827. Ohm's law is used to calculate the resistance in materials such as metal, which maintain a linear relationship between voltage and current. In addition, Ohm's formulas, which are derived from Ohm's Law, are used to calculate voltage and current if the other two measurements are known.OHM'S LAWwResistance = voltage divided by current R = V / I or R = E / I OHM'S FORMULASVoltage = 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 PowerPower in watts = voltage times current P = V * I.
The SI-derived unit of electrical resistance of a conductor through which a current of one ampere flows when subjected to a one-volt potential across its terminals.
noun
) The unit of both resistance (R) and impedance (Z). In the International System of Units (SI), one (1) ohm is the resistance such that a difference in potential of one (1) volt (V) between the positive (+) end and the negative (
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
noun

Singular:
ohm
Plural:

## Origin of ohm

• After Georg Simon Ohm

### From American Heritage Dictionary of the English Language, 5th Edition

• After Bavarian physicist Georg Ohm.