The curved lines denote electric cycles that are measured per second.

The curve of an Alternating Current when drawn on a graph represents the sine waveform. In AC, electrons continuously change their Directions from forward to backward periodically. The critical difference between Alternating Current and Direct Current lies in the Direction in which electric charges flow. The term AC refers to Alternating Current in Physics, which is highly preferred electric power for office, household equipment, and more. Learn more about the points that distinguish between AC and DC. However, Current continuously varies its Direction from forward to backward and vice versa. The major difference between AC and DC is that Current electricity flows gradually in one Direction in the Direct Current (DC). Hence, there are two ways of Current flow, namely Alternating Current (AC) and Direct Current (DC).

Electric Current flows either in one Direction or keeps changing its Directions periodically.