A 700-pF capacitor is connected across an ac source with a voltage amplitude of 160 V and a frequency of 20 kHz. (a) Determine the capacitive reactance of the capacitor and the amplitude of the output current of the source. (b) If the frequency is changed to 60 Hz while keeping the voltage amplitude at 160 V, what are the capacitive reactance and the current amplitude?

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A 700-pF capacitor is connected across an ac source
with a voltage amplitude of 160 V and a frequency of 20
kHz. (a) Determine the capacitive reactance of the capacitor
and the amplitude of the output current of the source. (b)
If the frequency is changed to 60 Hz while keeping the
voltage amplitude at 160 V, what are the capacitive
reactance and the current amplitude?

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