What condition occurs at Series Resonance?

At series resonance in an electrical circuit, a condition is reached where the inductive reactance and capacitive reactance are equal in magnitude but opposite in phase. This balance results in the cancellation of these reactances, allowing the circuit to behave as a purely resistive element at the resonant frequency. Consequently, the impedance at resonance is minimized, which leads to maximization of current flow in the circuit.

This phenomenon occurs because, at the resonant frequency, the overall impedance of the series circuit drops to its lowest value, which is primarily determined by the resistance of the circuit components. A lower impedance enables a higher current flow according to Ohm's Law, where current is inversely related to impedance for a given voltage. Therefore, the condition that manifests at series resonance is characterized by the maximum flow of current through the circuit.