What happens to current in a series circuit if one component fails?

In a series circuit, all components are connected end-to-end, creating a single path for current to flow. If one component fails—such as a resistor burning out or a bulb blowing out—the continuity of that single path is interrupted. This break in the circuit means that the current can no longer flow through the circuit. Consequently, the entire series circuit becomes non-functional, and the flow of current stops entirely. This principle is fundamental to understanding how series circuits operate, as they rely on all components being in working order for the current to continue.