Last modified on December 24, 2019, at 12:56

Kirchoff's voltage law

Kirchoff's voltage law (KVL) states that that the change in potential difference (in other words, the voltage drops) in any closed electrical circuit must sum to 0.[1] A voltage drop is the change in voltage over any element in a circuit.

KVL follows from the definition of electric potential and conservation of energy.[1]


  1. 1.0 1.1 Schwarz, Stephen E. and William G. Oldham. Electrical Engineering: An Introduction, 2e. Oxford University Press: 1993.