An LC tank circuit has a capacitor (C) and an inductor (L) connected together. It is used in oscillators and tuning circuits. The capacitor stores energy as electricity. The inductor stores energy as a magnetic field. Energy keeps moving back and forth between the capacitor and inductor. This creates continuous oscillations at a special frequency called the resonance frequency (fᵣ). At resonance: The effects of the capacitor and inductor cancel each other, so the current is maximum. Behavior at