Define a parallel circuit.

A parallel circuit is characterized by components that are connected across the same voltage source, meaning that each component has its own separate path for current to flow. This configuration allows the voltage across each component to be the same as the source voltage. Consequently, if one component in a parallel circuit fails or is disconnected, the other components can still continue to operate because they are not reliant on a single pathway for current. This distinguishes parallel circuits from series circuits, where the failure of one component would interrupt the entire circuit. Understanding this aspect of parallel circuits is crucial for applications in electrical systems, as it allows for more reliable and flexible designs.