An AC power plug is a device used to connect electrical appliances to an alternating current (AC) power supply. It typically consists of two or three metal prongs that fit into a corresponding outlet, allowing electricity to flow from the wall socket to the appliance. The design of the plug can vary by country, with different shapes and sizes to ensure compatibility with local electrical systems. AC power plugs are essential for powering everyday devices such as computers, televisions, and kitchen appliances. They are designed to provide a safe and reliable connection, often featuring safety mechanisms like grounding prongs to prevent electrical shocks.