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A 12 kΩ 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 = 0.3∠0° mA. The source voltage, expressed in polar form, is

3.84∠20.6° V
12.8∠20.6° V
0.3∠20.6° V
13.84∠69.4° V

Correct Answer: 3.84∠20.6° V

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