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9. A 9 mH coil is in parallel with a 0.015 μF capacitor across an 18 kHz ac source. The coil’s internal resistance, R_{W}, is 60 Ω. The circuit impedance is ________.
(a) 17,340 Ω
(b) 1,734 Ω
(c) 290 Ω
(d) 1,018 Ω
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