What defines a series circuit?

In a series circuit, there is only one path through which the electric current can flow. This unique pathway means that all components in the circuit are connected end-to-end, and the same amount of current flows through each component. If one component fails or is removed, the entire circuit is interrupted, and the current stops flowing. This feature is distinct from parallel circuits, which allow multiple paths for the current.

The characteristic of a series circuit influences how voltage is distributed across components and how resistance adds together, leading to a cumulative effect on overall circuit performance. Understanding the nature of series circuits is essential for troubleshooting and designing electrical systems, especially when analyzing how each component affects the overall functioning of the circuit.