What type of current is typically used in residential electrical systems?

In residential electrical systems, alternating current (AC) is the standard form of electricity supplied to homes. This type of current alternates direction periodically, which allows for the efficient transmission of electricity over long distances. AC is preferred for residential use primarily because it can be easily transformed to different voltages, facilitating its distribution from power plants to neighborhoods and individual homes.

Additionally, most household appliances, lighting, and heating systems are designed to operate using AC. This widespread compatibility underscores AC's role as the backbone of residential power supply. In contrast, direct current (DC) is typically used in specific applications such as batteries and some electronic devices, but it's not the standard for home electrical systems. Pulsating current and variable current are not standard definitions in the context of residential wiring; AC systems consistently provide a stable flow of electricity that is safe and efficient for household use.