Extension Cord

An extension cord is a flexible cable with a plug at one end and one or more sockets at the other. It is used to connect electrical appliances to an outlet. The model described here is a single-phase power strip with a plug at one end and multiple sockets at the other, where the sockets are connected in parallel (side by side). In a parallel circuit, electrical nodes are formed. The voltage between any two nodes remains the same across all branches, while the current flowing through each branch may vary depending on the resistance of the components within that branch. If one branch of the circuit is interrupted (e.g., if an appliance is shut off), it does not affect the operation of other branches, allowing other appliances to continue running.