What is the term for a closed path through which electricity leaves the source to power an appliance?

The term that describes a closed path through which electricity leaves the source to power an appliance is "Circuit." In electrical terminology, a circuit consists of a complete loop that allows electric current to flow from the power source to the appliance and back again. This continuous path is essential for the operation of electrical devices, ensuring they receive the necessary energy to function.

Understanding circuits is crucial in various applications, including esthetics, where electronic devices are often used. Recognizing the importance of a closed path ensures that equipment operates safely and efficiently, avoiding potential hazards associated with incomplete circuits.