The most common series circuit in everyday life is the light switch. A series circuit is a loop that is completed with a switch connection sending electricity through the loop.
There are many types of series circuits. Computers, televisions and other household electronic devices all work through this basic idea. A loop is created that links the power source to a switch that in turn links to the device requiring electricity that is linked back to the power source. In order to turn the device on and off, the switch breaks and reconnects the circuit. If any part of the linking system is broken, the entire system will fail. Another form of the circuit is parallel, which avoids the issue of breakdown using parallel links.