or parallel to, each other. This simple circuit is like a one-bulb version of a building’s lighting circuit. In a parallel circuit, if you want to add more bulbs, you add them on their own ...

Some of these could be replaced with a working bulb, but not all. The other type of circuit light strands use is a parallel circuit. In this setup, each bulb is on its own circuit to the power source.

A 6-V battery powers a circuit with parallel branches on a board. Several wires and light bulbs plug into the board to make various series and parallel circuits. The brightness of the bulbs changes ...