What is the main function of an inductor in an electric circuit?

The main function of an inductor in an electric circuit is to store energy in a magnetic field. When current flows through an inductor, it creates a magnetic field around it. This magnetic field stores energy, and when the current changes—such as when it is interrupted or reduced—the magnetic field collapses and releases that stored energy back into the circuit. This behavior is fundamental to how inductors operate and is utilized in various applications, such as filtering, energy storage in power supplies, and in oscillators.

Inductors are passive components crucial for managing current changes and stabilizing the flow of electricity within a circuit. Their ability to oppose changes in current ensures smoother operation in AC circuits, where current direction and magnitude continuously fluctuate.