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11. 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 ________.
(a) 1,878 Ω
(b) 18,780 Ω
(c) 18,750 Ω
(d) 626 Ω
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