ABSTRACT
This chapter deals with the concepts, terms and definitions associated with alternating quantities. The term alternating quantities refers to any quantity (current, voltage, flux, etc.), whose polarity is reversed alternately with time. For convenience, they are commonly referred to as a.c. quantities. Although an a.c. can have any waveshape, the most common waveform is a sinewave. For this reason, unless specified otherwise, you may assume that sinusoidal waveforms are implied.
