1.

A 12 kŒ© 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 ‚à †0¬∞ mA. The source voltage, expressed in polar form, is$?

A. 3.84 ‚à †20.6¬∞ V
B. 12.8 ‚à †20.6¬∞ V
C. 0.3 ‚à †20.6¬∞ V
D. 13.84 ‚à †69.4¬∞ V
Answer» B. 12.8 ‚Äö√ ‚Ä 20.6¬¨‚àû V


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