What describes the ability to store energy in a magnetic field?

Inductance is the property of an electrical circuit that allows it to store energy in a magnetic field when electrical current flows through a coil or inductor. This phenomenon occurs due to the creation of a magnetic field around the coil, which is directly proportional to the current flowing through it. When the current changes, the magnetic field also changes, inducing an electromotive force (EMF) in accordance with Faraday's law of electromagnetic induction. This ability to store energy and influence current flow makes inductance a fundamental concept in circuits, particularly in the context of alternating current (AC) applications.

In contrast, admittance refers to the measure of how easily a circuit allows current to flow, combining both conductance and susceptance. Capacitance, on the other hand, involves storing energy in an electric field in a capacitor, while resistance quantifies how much a material opposes the flow of electric current. Thus, the unique characteristic of inducing a magnetic field and storing energy within that field underscores the significance of inductance in electrical engineering and practical applications.