**Kirchoff’s Circuit Law**

We have seen that most linear circuits obey Ohm’s Law. However, sometimes in complex circuits such as bridge or T networks, we can not simply use Ohm’s Law alone to find the voltage or current circulating within the circuit. For such types of calculations, we need certain rules, which allow us to obtain the circuit equations and for this we may use Kirchoff’s Circuit Law.

In 1845, a German physicist, Gustav Kirchoff postulated a pair of laws to deal with the conservation of current and energy within electrical circuits. These two rules are commonly known as: Kirchoff’s Circuital Laws. One of the Kirchoff laws dealing with the current flowing around a closed circuit, Kirchoff’s Current Law, (KCL) while the other law deals with the voltage sources present in a closed circuit, Kirchoff’s Voltage Law, (KVL).