31. Alternating Current
Phasors for Inductors
Multiple Choice
Multiple ChoiceAn AC source operates at a maximum voltage of 75 V and is connected to a 0.4 H inductor. If the current across the inductor is i(t) = iMAX cos[(450 s −1)t],
a) What is iMAX?
b) Draw the phasors for voltage across the inductor and current in the circuit at t = 4.2 ms. Assume that the current phasor begins at 0°.
A
a) imax = 0.42A b) θiL = 108o θVL = 198o
B
a) imax = 0.42A b) θiL = 108o θVL = 18o
C
a) imax = 0.42A b) θiL = 198o θVL = 108o
D
a) imax = 0.42A b) θiL = 18o θVL = 108o
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