ABSTRACT
Kirchhoff developed two laws which further help the determination of unknown currents and voltages in D.C. series/parallel networks. This chapter explains Kirchhoff’s laws in detail using a number of numerical worked examples. An electrical/electronic engineer often needs to be able to analyse an electrical network to determine currents flowing in each branch and the voltage across each branch. The chapter helps the reader to state Kirchhoff’s laws and use Kirchhoff’s laws to determine unknown currents and voltages in D.C. circuits. The current law states that at any junction in an electric circuit the total current flowing towards that junction is equal to the total current flowing away from the junction. According to the voltage law, in any closed loop in a network, the algebraic sum of the voltage drops (i.e. products of current and resistance) taken around the loop is equal to the resultant e.m.f. acting in that loop.
