The Generator

Chapter The Generator

Complete Electronics Self Teaching Guide with Projects
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Complete Electronics Self Teaching Guide with Projects

  • CHAPTER 5 AC PRETEST AND REVIEW188This chapter discusses the following: ■ Generators ■ Sine waves ■ Peak-to-peak and root mean square voltages ■ Resistors in AC circuits ■ Capacitive and inductive reactance ■ ResonanceTHE GENERATOR1  In electronic circuits powered by direct current (DC), the voltage source is usually a battery or solar cell, which produces a constant voltage and a constant current through a conductor.In electronic circuits or devices powered by alternating current (AC), the voltage source is usually a generator, which produces a regular output waveform, such as a sine wave.QUESTIONDraw one cycle of a sine wave.ANSWERFigure 5.1 shows one cycle of a sine wave.FIGURE 5.12  A number of electronic instruments are used in the laboratory to produce sine waves. For purposes of this discussion, the term generator means a sine wave source. These generators enable you to adjust the voltage and frequency by turning a dial or pushing a button. These instruments are called by various names, generally based on the method of producing the sine wave, or the application as a test instrument. The most popular generator at present is called a function generator. It provides a choice of functions or waveforms, including a square wave and a triangle wave. These waveforms are useful in testing certain electronic circuits.Book Authorc05V107/04/2012 3:03 PM c05.indd 1887/4/2012 3:03:52 PM