April 2016
Beginner
1072 pages
39h 7m
English
In a complex circuit containing resistors, inductors, and capacitors, how do you determine what kind of power is being used? The best place to start is with the generalized power law P = IRMSVRMS. However, for now, let’s replace P with VA, and call VA the apparent power:
VA = IRMSVRMS |
(2.74) Apparent power |
In light of our RL series circuit in Fig. 2.167, we find the apparent power to be:
VA = IRMSVRMS = (0.107A)(12 V) = 1.284 VA
The apparent power VA is no different from the power we calculate using the generalized ac power expression. The reason for using VA instead of P is simply a convention used to help distinguish the fact that the calculated power isn’t purely ...
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