What is LC Circuitr The circuits which have L, C elements, those have special characteristics due to their frequency characteristics like frequency Vs current, voltage and impedance. These characteristics may have a sharp minimum or maximum at particular frequencies. The applications of these circuits mainly involve in transmitters, radio receivers and TV receivers. Consider an LC circuit in which capacitor and inductor both are connected in series across a voltage supply. The connection of this circuit has a unique property of resonating at a precise frequency termed as resonant frequency. This article discusses about what is an LC circuit, resonance operation of a simple series and parallel LC circuit.