NLC Electrical Grid 2 Practice Test

Combination circuits mix series and parallel connections within the same network. In these circuits some components share the same current because they’re in series, while others share the same voltage because they’re in parallel. This blend means you analyze by breaking the network into sections: identify groups in series, reduce them to their equivalent, then handle the parallel parts, and repeat as needed.

For example, a resistor in series with a parallel pair of resistors creates a layout that isn’t purely series or purely parallel. You would first find the equivalent resistance of the parallel pair, then add the series resistor to get the total. This approach reflects why the description “series and parallel combined” is the correct way to characterize these circuits.

It isn’t a pure series circuit, which would have the same current through every element, and it isn’t a pure parallel circuit, where all elements share the same voltage. It also isn’t about multiple isolated loops; the network remains interconnected, just with both kinds of connections present.