Capacitance opposes changes in voltage, while what opposes changes in current?

Inductance is the property of an electrical circuit or component that opposes changes in current. This opposition is due to the magnetic fields created around coils of wire when current flows through them. When the current changes, the magnetic field also changes, inducing a voltage that acts to oppose the change in current. This behavior is a fundamental characteristic of inductors, which are devices specifically designed to utilize this property.

In contrast to capacitance, which stores energy in an electric field and resists changes in voltage, inductance involves the storage of energy in a magnetic field and is specifically associated with the opposing effects it has on current flow. As a result, inductance is crucial in applications where managing current fluctuations is necessary, such as in oscillators, filters, and transformers.