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Find out reactance of values of capacitor at frequencies

Find out the reactance of the values of capacitor at the frequencies given below. Then find out the value of inductor in each case that will provide similar reactance as the capacitor as follows:.

(a)  3.3 µF at 50Hz

(b)  12nF at 20kHz and

(c)  4.7pf at 250MHz.

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