What is a feature of alternating current?

The characteristic of alternating current (AC) is that electrons flow out from the source and then back, changing directions. In AC, the current periodically reverses its direction, which means that the flow of electric charge oscillates back and forth. This oscillation occurs at a specific frequency, which is measured in hertz (Hz), indicating how many times the current changes direction each second.

This feature is crucial in many applications, especially in household electricity, where AC is widely employed for powering appliances and lighting. The ability to easily transform voltage levels with transformers and the efficiency of transmitting electricity over long distances are also key advantages of using alternating current. Understanding this behavior helps in various practical applications, including power generation and distribution systems.