AC electricity, or alternating current, is a type of electrical current that periodically reverses direction. Unlike direct current (DC), where the flow of electricity is constant, AC changes its voltage and current direction in a sinusoidal pattern. This makes it suitable for powering homes and businesses, as it can be easily transformed to different voltages. The primary advantage of AC electricity is its ability to be transmitted over long distances with minimal energy loss. This is achieved through the use of transformers, which adjust the voltage levels for efficient transmission. Most electrical outlets in homes provide AC electricity, making it the standard form of electrical power used worldwide.