Power cords are electrical cables that connect devices to a power source, allowing them to operate. They typically consist of insulated wires that carry electricity and are often equipped with plugs on one end to fit into outlets. Common devices that use power cords include computers, televisions, and kitchen appliances. Power cords come in various lengths and types, depending on the device's requirements. Some cords are designed for specific voltages and currents, while others may have additional features like surge protection. Proper use and maintenance of power cords are essential for safety and efficiency in electrical systems.