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Unformatted text preview: Sin( $ t) Phasor " A sinusoidal function y = A sin % can be represented graphically as a phasor vector with length A and angle % (w.r.t. to horizontal) % A sin % Resistors in an AC Circuit " Ohm’s Law: # V= I R at any time i i R = # V/R=I max sin $ t, I max = # V max /R # The current through an resistor is in phase with the voltage across it Phasor view Function view Inductors in an AC Circuit " # V  Ldi/dt =0 " i L =I max sin( $ t& /2) I max = # V max / X L , X L = $ L ! inductive reactance # The current through an inductor is 90 o behind the voltage across it. Phasor view Function view i Capacitors in an AC Circuit " # V  q/C=0, dq/dt =i i " i L =I max sin( $ t+ & /2) I max = # V max / X C , X C = 1/( $ C) ! capacitive reactance # The current through a capacitor is 90 o ahead of the voltage across it. Phasor view Function view...
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 Spring '08
 Everett
 Physics, RC Circuits, RC circuit, RL circuit, LC circuit, ac circuit, Vmax sin

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