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15. A 470 Ω resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is ________.
(a) 12.60 ∠–76° mS
(b) 12.18 ∠76° mS
(c) 218 ∠–76° mS
(d) 12.18 ∠–76° mS
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