What is AC (Alternating Current)?

Alternating Current (AC) is characterized by the alternation of the direction of current flow. In AC, the current changes direction periodically, meaning that the flow of electrons is not fixed in one direction, unlike Direct Current (DC), where electrons flow steadily in a single direction.

This back-and-forth motion of electrons in AC is a crucial aspect because it allows for the efficient transmission of electricity over long distances and is compatible with transformers, which can easily change voltage levels. The regular change in direction typically follows a sinusoidal pattern, commonly seen in standard household electrical systems, which is significant for both safety and functionality in electrical applications.

The other options describe characteristics that are not representative of AC. For example, a steady flow of electrons in one direction describes DC, while a continuous increase in electron flow does not accurately depict the cyclical nature of AC. Similarly, pushing without pulling misses the fundamental principle of how electrons oscillate in AC systems.