What type of reactance opposes alternating current flow through an inductor?

Inductive reactance is the type of reactance that specifically opposes the flow of alternating current (AC) through an inductor. This opposition arises due to the magnetic field created around the coil of the inductor when AC flows through it. As the current alternates, the changing magnetic field induces a voltage that opposes the current change, according to Lenz's law. This effect is quantified by the formula for inductive reactance, which is directly proportional to both the frequency of the AC signal and the inductance of the coil.

In electrical circuits, inductive reactance plays a crucial role in determining how much current will flow at a given frequency. This behavior is essential for understanding how inductors function in AC circuits, influencing designs in power systems, signal processing, and other applications. Thus, when dealing with AC and inductors, inductive reactance is the primary factor to consider regarding opposition to current flow.