August 2020
Intermediate to advanced
528 pages
22h 16m
English
Content preview from Engineering Science, 2nd Edition
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Chapter 31
Earlier, in Chapter 29 we introduced several important concepts relating to the power in an a.c. circuit. Throughout that chapter we assumed that the waveforms of current and voltage were purely sinusoidal, but this is often not the case. Now let’s combine what we’ve just learned from the two previous chapters in order to determine the power and power factor when the applied waveform is complex rather than purely sinusoidal.
31.1 RMS Value of a Waveform
The root mean square (RMS) value of a waveform is the effective value of the current or voltage concerned. It is defined as the value of direct current or voltage that would produce the same power in a pure resistive load.
Assume that we are dealing ...
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