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MENTAL MODEL · M6278

Ohm's Law

Ohm's Law
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Version 1.0.0 · Updated 2026-07-28

CORE DEFINITION

In electrical circuits, Ohm's law states that, at constant temperature, the voltage V across a conductor is proportional to the current I flowing through it. Mathematically, it is expressed as V ∝ I. Therefore, for any conductor (circuit, component, or resistor), the resistance R can be defined as the proportionality constant of this relation: R = V / I.

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In electrical circuits, Ohm's law states that, at constant temperature, the voltage V across a conductor is proportional to the current I flowing through it. Mathematically, it is expressed as V ∝ I.

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In linear components, I = V/R; flow is determined by the ratio of driving force to resistance, with the three being linearly coupled.

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Source support: Explicit

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    zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%AC%A7%E5%A7%86%E5%AE%9A%E5%BE%8BZH · Explicit
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