In a pure inductive circuit, how are the voltage and current related?

In a pure inductive circuit, voltage and current are indeed 90 degrees out of phase with each other. This means that when the current reaches its maximum value, the voltage reaches zero, and vice versa. This phase difference occurs because, in an inductor, the voltage across the inductor leads the current.

Inductors store energy in their magnetic fields when current flows through them. As the current changes direction, the inductor resists that change due to its inductance, which results in the current lagging behind the voltage. This characteristic is essential in understanding how inductors behave in AC circuits and is critical in designing and analyzing various electrical systems.

In contrast, the other options suggest different phase relationships that do not accurately describe the behavior of voltage and current in a pure inductive circuit. For example, "in phase" implies that both current and voltage reach their peak values simultaneously, which is characteristic of a purely resistive circuit, not an inductive one. "180 degrees out of phase" would suggest that when one reaches its maximum, the other is at its maximum in the opposite direction, which does not occur in inductive circuits. Lastly, "360 degrees out of phase" would imply that both quantities are effectively in phase again