Kirchhoff laws

Overview

Kirchhoff's laws are fundamental rules for analyzing electrical circuits. The current law (KCL) applies to nodes, and the voltage law (KVL) applies to loops.

Key Formulas

Kirchhoff's Current Law (KCL)

$\sum I_{in} = \sum I_{out}$

Total current entering a node equals total current leaving.

Kirchhoff's Voltage Law (KVL)

$\sum V = 0$

Sum of voltage drops around any closed loop is zero.

References

• Original Source