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

A 12 kΩ resistor is in series with a 90 mH coil across an 8 kHz ac so

1.	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
A.	3.84 ∠20.6° V
B.	12.8 ∠20.6° V
C.	0.3 ∠20.6° V
D.	13.84 ∠69.4° V
Answer» B. 12.8 ∠20.6° V