About Those Series and Parallel Circuits Resistors, capacitors and inductors are easy once you understand the basics By Mark Persons Published: July 7, 2025 ...

Series circuits are useful if you want a warning that one of the components in the circuit has failed. For example, a circuit breaker or a fuse must be connected in series in order for it to work.

Engineers connect components in electrical circuits in series or parallel to make a range of useful circuits. We can calculate the voltage, current and resistance in these circuits.

So we use parallel circuits for power and (generally) series circuits for control. In some cases, control circuits use a parallel configuration. Consider the common example of wiring up a three-way ...

This article discusses Loudspeaker Impedance and the load an amplifier sees if you wire speakers in series or parallel. We discuss the math and expected SPL differences as well as pros/cons of each.