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A 6.8 kΩ resistor, a 7 mH coil, and a 0.02 µF capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 Ω. The equivalent parallel resistance, Rp(eq), is

1,878 Ω
18,780 Ω
18,750 Ω
626 Ω

Correct Answer: 18,780 Ω

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