An electric circuit is a closed loop that allows electric current to flow. It consists of various components, such as a power source (like a battery), conductors (usually wires), and devices that use electricity (like light bulbs or motors). When the circuit is complete, electricity can travel through the components, enabling them to function. Circuits can be classified as either series or parallel. In a series circuit, all components are connected in a single path, so the same current flows through each one. In a parallel circuit, components are connected across common points, allowing multiple paths for the current. This design affects how devices operate and how much power they receive.