Inductance is the property of an electrical component, typically a coil or inductor, that opposes changes in current flow. When current flows through an inductor, it creates a magnetic field that resists any change in the current. Inductance is measured in henries (H) and is an important concept in AC circuits, where inductors can store energy in their magnetic field and influence the flow of current. Inductance plays a key role in filters, transformers, and motors, and is used to control signal timing and energy storage in many electronic applications.