6
AC FUNDAMENTALS
LEARNING OBJECTIVES
After the completion of this chapter, the students or readers will be able to understand the following:
- What is an alternating voltage and current and how it is differed from direct current (DC)?
- How sinusoidal alternating current is produced?
- Why alternating voltages are represented by phasors?
- What is frequency, time period, cycle, and alternation?
- What are instantaneous value, peak value, average value, and root-mean-square (rms) value of an alternating current?
- What is phase and phase difference?
- How alternating quantities are added or subtracted?
6.1 INTRODUCTION
As discussed earlier, the flow of current in the circuits was steady and in only one direction, that is, direct current (DC). The use ...