Which type of current do most household appliances use?

Most household appliances use alternating current (AC) because this type of current is more efficient for power distribution over long distances, which is ideal for residential use. AC allows electrical energy to be easily transformed to different voltages using transformers. This capability supports the standardization of electrical grids, making the supply of electricity more reliable and cost-effective.

In homes, electrical outlets are typically designed to supply AC at a specified voltage (usually 120V or 240V, depending on the region). Appliances such as refrigerators, televisions, and washing machines are designed to operate on this alternating current, taking advantage of its suitability for both heating and motor functions.

While direct current (DC) is used in some specific applications and devices, such as batteries and electronics, it is not the primary source for most household appliances. Similarly, while batteries provide DC power, their use is limited to portable devices rather than the plug-in home appliances that require a continuous and consistent power supply, which AC offers. Hence, the preference for alternating current in household settings is predominant, underlining the significance of this choice in the context of the question.