In an A-C circuit, opposition to any current change caused by inductance is known as what?

In an A-C circuit, the opposition to current change caused by inductance is known as inductive reactance. This phenomenon arises from the tendency of inductors to resist changes in the current flowing through them. When the current in an inductive element in an alternating current circuit changes, it generates a magnetic field. If this current tries to change, the magnetic field also tries to oppose this change according to Lenz's law. The result is that the inductor reacts by creating a voltage that opposes the change in current.

Inductive reactance is measured in ohms and is frequency-dependent; it increases with the frequency of the alternating current. This concept is crucial for understanding A-C circuits, particularly for those involving transformers and inductors, as it directly affects the power and efficiency in these systems. Inductive reactance is a fundamental concept in electrical engineering that helps in the design and analysis of A-C circuits.