Inductors are passive electrical components that store energy in a magnetic field when electric current flows through them. They are commonly used in various electronic circuits to filter signals, store energy, and manage current flow. The inductance of an inductor is measured in henries (H) and is determined by its physical characteristics, such as the number of coils and the core material. Inductors play a crucial role in applications like transformers, chokes, and oscillators. They can be found in power supplies, radio frequency circuits, and many other electronic devices. Understanding how inductors work is essential for designing efficient electronic systems.