An inductor is a passive electrical component that stores energy in a magnetic field when an electric current flows through it. It typically consists of a coil of wire, and its primary function is to resist changes in current. Inductors are commonly used in various electronic circuits, including filters and oscillators. The inductance of an inductor is measured in henries (H) and depends on factors such as the number of turns in the coil, the material of the core, and the coil's geometry. Inductors are often found in devices like transformers and power supplies, playing a crucial role in managing electrical energy.