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# AC RC CIRCUITS

The term "AC" stands for "Alternating Current", typically the 60 Hz power available from any North American electrical outlet.21.1 A complete discussion of AC circuits must involve the "inertial" effect of inductance, but a useful introduction can be developed using only capacitance and resistance .

We begin by picturing a generic series- circuit driven by a sinusoidal voltage . It is convenient to use the complex form21.2for calculations; just remember that none of the actual physical quantities like current or voltage will actually have a measurable imaginary part.21.3 The voltage amplitude is taken to be pure real.

#### Footnotes

. . . outlet.21.1
In Europe and much of Asia the standard is 50 Hz.
. . . form21.2
Here signifies "the real part of" a complex quantity like . The imaginary part is written (e.g.) .
. . . part.21.3
Let me know if you invent an imaginary voltmeter!

Jess H. Brewer - Last modified: Mon Nov 16 18:06:18 PST 2015