What does an AC circuit typically use an inductor for?

An inductor in an AC circuit is primarily used to filter signals and manage current. This occurs due to the inductor's ability to resist changes in current flow through it, a property rooted in its inductance. When an AC signal flows through an inductor, it creates a magnetic field, which stores energy. As the AC signal changes, the magnetic field fluctuates, and this behavior allows inductors to smooth out current variations, filter out unwanted noise, and define frequency response characteristics within the circuit.

By doing this, inductors can effectively shape the waveform of the current, allowing for better management of signal integrity, which is crucial in various applications such as audio electronics, radio frequency systems, and power supplies, where maintaining a clean and stable current is essential. This function distinguishes inductors from other components like resistors or capacitors that serve different roles within an electrical circuit.