Gustav Kirchhoff was a smart German bloke who described two laws of great importance to those doing ELEC1111
Kirchhoff's Current Law (KCL)Edit
KCL essentially states that the sum of the currents into a node is equal to the sum of the currents leaving the node. This is the basis of node voltage analysis
Kirchhoff's Voltage Law (KVL)Edit
KVL states that the sum of the emfs is equal to the sum of the potential drops round a closed loop. Mesh Loop analysis is based on KVL.