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Kirchhoff’s laws

A Dictionary of Physics
Jonathan LawJonathan Law, Richard RennieRichard Rennie

Kirchhoff’s laws 

Two laws relating to electric circuits, first formulated by Gustav Kirchhoff. (a) The current law states that the algebraic sum of the currents flowing through all the wires in a network that meet at a point is zero. (b) The voltage law states that the algebraic sum of the e.m.f.s within any closed circuit is equal to the sum of the products of the currents and the resistances in the various portions of the circuit.