An alternating current regularly changes direction. On a voltage-time graph, this would appear as a curve alternating between positive and negative voltages. The positive and negative values ...

This is alternating current or ac. The output of an alternator can be represented on a potential difference-time graph, with potential difference on the vertical axis and time on the horizontal axis.

The highest-ranking of AC/DC’s current hits on the Hard Rock Streaming Songs chart is the one that doesn’t budge an inch. “Thunderstruck” is a non-mover at No. 3 on the streaming-only ...