In a parallel circuit, why does the current lag the source voltage at frequencies below resonance?
Answer In a parallel LC circuit, the current lags the voltage at frequencies below resonance because the resulting impedance is inductive. A lower impedance means a higher current. Below resonance, the inductive reactance is lower than the capacitive reactance. As the frequency increases above resonance, then the capacitive reactance would be lower. The current would lead the voltage when above resonance because then the impedance would be capacitive. Hope this helps!
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