Ohm's law

relationship between voltage and current across an ideal resistor

AI overview

Ohm's law describes how voltage, current, and resistance are related in an electrical circuit: the current flowing through a resistor is directly proportional to the voltage applied across it. This relationship is fundamental to understanding and designing electrical circuits, since it allows engineers and technicians to predict how much current will flow when a specific voltage is applied.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Instance of: physical law
Named after: Georg Simon Ohm
Main subject: resistor
Image: OhmsLaw.svg

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Commons category: Ohm's law
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
maintained by WikiProject: WikiProject Mathematics

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Encyclopedic overview

V, I, and R, the parameters of Ohm's law

Ohm's law states that the electric current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the three mathematical equations used to describe this relationship:

Excerpted from Wikipedia’s “Ohm's law” article, available under the CC BY-SA 4.0 licence.