An inductor is a passive electrical component utilized in electrical engineering and physics that stores energy in a magnetic field when electric current flows through it. Functionally, it opposes changes in current flow by generating a voltage proportional to the rate of change of that current. Typically constructed as a coil of conductive material, the component's magnetic properties can be enhanced by incorporating a core material, which significantly influences its operational inductance. Inductors are critical components in various electronic circuits, serving essential roles in filtering signals, tuning resonant circuits, and managing energy transfer in both power and high-frequency electronics.