Explain the meaning of the term resonance as applied to a series A.C circut. What is the best way of answering this question. Im kind of confused on what to include in the definition and what not to include. We know that the capacitive reactance and the inductive reactance depend on frequency. The value of frequency when w = 1/(sqaureroot of LC) = 2.pi.f0 The frequency f0 is called the resonance frequency of the circuit. At this frequency the impedance is smallest. At this frequency the circuit is said to be at resonance. At resonance the current is in phase with the generator voltage. Is this an ok answer or is their a better one i could use???? Also can anyone find a link to the phasor diagram to illustrate this?? Thank you.