Ohm's law

American  

noun

Electricity.

1. the law that for any circuit the electric current is directly proportional to the voltage and is inversely proportional to the resistance.

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Ohm's law British  

noun

1. the principle that the electric current passing through a conductor is directly proportional to the potential difference across it, provided that the temperature remains constant. The constant of proportionality is the resistance of the conductor

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Ohm's law Scientific  

/ ōmz /

1. A law relating the voltage difference between two points, the electric current flowing between them, and the resistance of the path of the current. Mathematically, the law states that V = IR, where V is the voltage difference, I is the current in amperes, and R is the resistance in ohms. For a given voltage, higher resistance entails lower current flow.

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Etymology

Origin of Ohm's law

First recorded in 1840–50; named after G. S. Ohm

Example Sentences

Electric conduction, which is crucial for many devices, follows Ohm's law: a current responds proportionally to applied voltage.

From Science Daily • Apr. 23, 2024

One statement of Ohm's law gives the relationship between current I , voltage V , and resistance R in a simple circuit to be I = V .

From Textbooks • Aug. 12, 2015

To summarize, when dealing with AC, Ohm's law and the equations for power are completely analogous to those for DC, but rms and average values are used for AC.

From Textbooks • Aug. 12, 2015

What the most common ohmmeters actually do is to apply a voltage to a resistance, measure the current, and calculate the resistance using Ohm’s law.

From Textbooks • Aug. 12, 2015

But the ions of an electrolytic solution can move independently through the liquid, even when no current flows, as the consequences of Ohm’s law indicate.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" by Various