Inductance is a property of an electrical circuit that quantifies the ability of a conductor, such as a coil or wire, to store energy in a magnetic field when an electric current flows through it. It is measured in henries (H) and is influenced by factors like the number of turns in the coil, the material of the core, and the coil's shape. When the current changes, the magnetic field also changes, which induces a voltage in the conductor that opposes the change in current. This phenomenon is described by Faraday's Law of Electromagnetic Induction and is fundamental in devices like transformers and inductors.