Physics Laws & Theorems
Intermediate

Kirchhoff's Voltage Law

The sum of voltages around any closed loop is zero.

Formula

∑V=0\sum V = 0

Variables

VVoltages in a loop

Example

Around any loop, the battery’s voltage equals the sum of the voltage drops.

Did You Know?

Around any loop, the voltage gains and drops must cancel — energy can't be created in a circuit.

circuitkirchhoffvoltagelaw