When a 50- mu F capacitor is attached to an AC source, its capacitive reactance

Question

When a 50- mu F capacitor is attached to an AC source, its capacitive reactance is 40 Ohm. If instead a 100- mu F capacitor is attached to the same source, what will be its capacitive reactance? a. 80 Ohm b. 57 Ohm c. 28 Ohm d. 20 Ohm ANS: D PTS: 1 DIF: 2 TOP: 21.2 Capacitors in an AC Circuit In an AC series circuit, the voltage in the inductor differs in phase with the voltage in the capacitor what angle? a. zero b. 45 degree c. 90 degree d. 180 degree ANS: D PTS: 1 DIF: 1 TOP: 21.3 Inductors in an AC Circuit

Explanation / Answer

11)XC= 1/wC

w = 1/(Xc C)

= 1/( 40*50*10^-3)

Xc = 1/ w C = 40*50*10^-3/100*10^-3

Xc= 20 ohms

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