Each time the voltage reverses polarity, the current flow through the circuit changes in what way?

When the voltage in a circuit reverses polarity, the most significant change observed is in the direction of the current flow. In an electrical circuit, current is defined as the flow of electric charge, and this flow is influenced by the voltage applied across the circuit. When the voltage polarity reverses, it effectively changes the electric field direction, causing the current to flow in the opposite direction.

This behavior is particularly relevant in alternating current (AC) systems, where the voltage periodically changes polarity, resulting in the current also reversing its direction at regular intervals. Understanding this concept is essential for working with AC circuits, as it illustrates the fundamental differences compared to direct current (DC) systems, where the current flows in a single direction.

While changes in voltage can also affect the current's amplitude, this does not address the specific question about how the current flow changes with respect to polarity.