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Unformatted text preview: Inductors in AC Circuits Previously, a procedure was discussed for working with circuits containing resistors and capacitors driven by sinusoidal alternating current sources. Essentially, all circuit elements were converted to phasors , math was carefully done on these complex values, and the results were converted back to the time domain . Generically, voltages and currents of the form A trig ( t + ) became A where A was the amplitude, was the phase shift, and trig was either sin or cos . A resistance simply became ! R = R ! . A capacitance became a kind of reactance : ! X = ! 1 " C # 90 . Inductances also become reactances. The value is given by ! X = ! L " 90 . Recall that phasors can be directly added only if they have the same angle. The only significant difference between capacitive and inductive reactances is that one kind is negative and the other is positive....
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This note was uploaded on 04/05/2012 for the course PHYS 131 taught by Professor Tibbets during the Spring '11 term at Cuyamaca College.
 Spring '11
 Tibbets
 Current, Work

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