What does apparent power refer to in an electrical circuit?

Apparent power is a crucial concept in AC (Alternating Current) circuits, characterized by its measurement in volt-amperes (VA). It represents the total power flowing in a circuit, which includes both the real power that performs actual work and the reactive power that oscillates between the source and the load.

In a reactive AC circuit, where inductance or capacitance is present, the apparent power reflects the combined effects of active power (real power, which performs useful work) and reactive power (which supports the electric and magnetic fields). Therefore, saying that apparent power refers to VA supplied to a reactive AC circuit accurately captures its role in electrical systems with both types of power.

This is why the correct answer is indeed related to this context of VA in reactive circuits, emphasizing the total power without differentiating between the consumed or useful power and that which is merely circulating due to inductive or capacitive effects.