An electric extension (or extension cord) is a flexible power cable with a plug on one end and one or multiple sockets on the other. It allows electrical devices to be powered when their original cords are too short to reach an outlet. Extension cords come in various lengths, thicknesses, and power ratings to handle different electrical loads. Some include features like surge protection, multiple outlets, USB ports, and on/off switches. They are commonly used in homes, offices, and workshops to extend power access safely.