Series and Parallel Circuits

electricity · circuits · how-things-work

Series circuits. In a series circuit, all the components line up one after the other, so electricity has only one path to follow. If one component breaks, the whole circuit stops working, just like when one broken bulb makes the whole string of holiday lights go dark.

Parallel circuits. In a parallel circuits, the electricity splits into multiple pathways, like a river dividing into separate streams. If one component breaks, electricity still flows through the other paths, so the other parts keep working.

Real-world uses. Your home uses parallel circuits so that each light and appliance can turn on and off independently. Your Christmas lights might use series circuits to keep them compact, but modern ones often use parallel circuits to avoid the broken bulb problem.

Voltage and current. Series circuits divide voltage among all components, so each one gets a smaller amount. Parallel circuits share the current instead, so each path gets the same voltage as the battery.

Combinations work too. Many real devices use a mix of series and parallel circuits together to do different jobs. This hybrid approach helps engineers design things that are safe, reliable, and do exactly what they're supposed to do.