1.23 Find the complex impedance at 10 kHz of the following networks:
(a) 1 kΩ in series with 1 nF
(b) 1 kΩ in parallel with 0.01 µF
(c) 10 kΩ in parallel with 100 pF
(d) 100 kΩ in series with 10 mH
(a) (1 − j15.9) k; (b) (717 + j450)Ω; (c) (9.96 − j0.626) k; (d) (105 + j628)Ω
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