<p>Hey! We’re currently doing circuits, and we’ve hit a snag: we have no idea what determines the brightness of a bulb. Our entire class gets to those problems like “List the bulbs in this circuit in order of their brightness” and “If this bulb is removed, does the next bulb brighten or dim?” and we’re all stumped, even our teacher.</p>
<p>Can anyone explain bulbs?</p>