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electrical engineering rl circuits
1. A 12 k resistor is in series with a 90 mH coil across an 8 kHz ac source. Current flow in the circuit, expressed in polar form, is I = 0.30° mA. The source voltage, expressed in polar form, is
(A): 0.320.6° V
(B): 12.820.6° V
(C): 13.8469.4° V
(D): 3.8420.6° V
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