What property of a coil of wire opposes any change in current?

Inductance is the property of a coil of wire that opposes any change in current flowing through it. This phenomenon occurs due to the magnetic field generated around the coil when current flows through it. If there is an attempt to change the current—either by increasing or decreasing it—the coil will induce a voltage in the opposite direction to the change, according to Lenz's Law. This induced voltage creates a back electromotive force (EMF), which effectively resists the change in current.

In contrast, resistance is related to the opposition to current flow in a circuit, but it does not specifically address the time-varying aspect of current. Capacitance pertains to the ability of a component to store electrical charge and is not directly linked to opposing changes in current. Reactance combines the effects of both inductance and capacitance in AC circuits, but it does not solely represent the property that opposes changes in current like inductance does. Thus, the key characteristic of inductance makes it the correct answer in this context.