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Kirchhoff's Current Law (KCL)

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated August 2025

Definition

Kirchhoff's Current Law, also known as KCL, states that the total current entering a junction or node in an electrical circuit is equal to the total current leaving that junction. In other words, the sum of currents flowing into a point in a circuit is equal to the sum of currents flowing out of that point.

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