Kirchhoff's Law
Kirchhoff's circuit laws are two equalities that deal with the conservation of charge and energy in electrical circuits, and were first described in 1845 by Gustav Kirchhoff. Widely used in electrical engineering, they are also called Kirchhoff's rules or simply Kirchhoff's laws
Kirchhoff's current law (KCL)
The current entering any junction is equal to the current leaving that junction. i1 + i4 = i2 + i3
This law is also called Kirchhoff's point rule, Kirchhoff's junction rule (or nodal rule), and Kirchhoff's first rule. The more simplified form the law is stated as " The algebraic sum of current at a junction is zero"
Kirchhoff's voltage law (KVL)
The sum of all the voltages around the loop is equal to zero. v1 + v2 + v3 + v4 = 0
This law is also called Kirchhoff's second law, Kirchhoff's loop (or mesh) rule, and Kirchhoff's second rule:
"The sum of the emf's in a closed circuit is equal to the sum of potential drops in that same circuit".
