What type of current primarily powers household electrical outlets?

Household electrical outlets primarily use alternating current (AC) because this type of current enables efficient transmission of electricity over long distances. The ability to easily transform AC into different voltages makes it suitable for residential use. This is crucial for maintaining the supply of electricity to homes, allowing the use of various appliances that require different voltage levels.

In contrast, direct current (DC) is typically used in smaller batteries and electronic devices, where a steady and constant voltage is needed. High frequency current is not commonly applied in general household use; it is more relevant in specialized applications like radio transmissions. Similarly, low voltage current does not describe the type of power delivered through standard household outlets, as typical household voltage levels are higher, often ranging from 120 to 240 volts depending on the region. Thus, the use of alternating current is integral for the efficient and versatile functioning of household electrical systems.