Kirchoff's law
Kirchhoff`s laws are named after the German physicist Gustav Robert Kirchoff, (1824 - 1887) who made a name for himself through his research in spectrum analysis, optics and electrics.
Kirchhoff's current law (KCL) and voltage law (KVL) are relevant to electronics. Both Kirchhoff's laws belong to the basic laws of electronics. According to the current law, the sum of all currents flowing into a quadripole or a node is always equal to the sum of the currents flowing out. Or, to put it another way, the sum of all currents flowing into and out of a quadripole is zero.
According to Kirchhoff's voltage law, all voltage increases and decreases in a closed circuit are equal to zero.