Please answer and explain numbers 2 and 3 The capacitive reactance decreases by

Question

Please answer and explain numbers 2 and 3

The capacitive reactance decreases by a factor of four.The current in a certain is independent of the frequency at a given voltage. Which combination of elements is most likely to comprise the circuit? resistors only inductors only capacitors only a combination of inductors and resistors a combination of inductors and capacitors A battery is used to drive a circuit. After a certain amount of time, the current is zero amperes. When the same circuit is driven by an ac generator, the current isnon-zero and alternates. Which combination of elements is most likely to comprise the circuit? resistors only inductors only capacitors only a combination of inductors and resistors a combination ot inductors and capacitors Three 4.0-muF capacitors are connected in parallel across the terminals of a 60.0-Hz generator. What is the capacitive reactance of the circuit?

Explanation / Answer

in AC cirucit Current across resistor is given by i = V/R

Impedence Z ^2 + (XL-Xc)^2

during resonance XL = Xc

so when it is not depending on frequency, i is related to only R but not for L and C

so correct answer for 2 is only Resistors , option A

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3. since current is non zero, it mus be option D

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