A power plug is a device used to connect electrical appliances to a power source. It typically consists of metal prongs that fit into a corresponding socket, allowing electricity to flow from the outlet to the appliance. Power plugs come in various shapes and sizes, depending on the country and electrical standards. The design of a power plug ensures safety and compatibility with electrical systems. Common types include the Type A and Type B plugs used in North America, and the Type C plug commonly found in Europe. Each type has specific voltage and current ratings to prevent electrical hazards.