ABSTRACT
This chapter discusses the behaviour of series and parallel AC circuits. It provides equations for solving series or parallel AC circuit problems. The chapter represents the current phasor diagram and the voltage phasor diagram. It converts a series circuit phasor diagram into an impedance diagram and power diagram. Also, it converts a parallel circuit phasor diagram into an admittance diagram and power diagram. The chapter states that, the purely resistive, purely inductive, and purely capacitive circuits are 'ideal' circuits. By understanding the 'ideal' circuits, one can extend that understanding to 'real' circuits: resistive-inductive (R-L), resistive-capacitive (R-C) and resistive-inductive-capacitive (R-L-C) circuits. To draw the phasor diagram for a parallel R-L circuit, the reference phasor is drawn along the positive, horizontal, axis. For an R-C parallel circuit, it it is same as R-L parallel circuit, except that the current is passed through the capacitive branch (IC). For the R-L-C parallel circuit, the reference phasor is drawwn along the positive, horizontal, axis.
