PHYSICS · Subjective · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits
Problem
Four identical lightbulbs, each with the same resistance, are connected individually to four different ideal power supplies that provide emfs of 4 V, 6 V, 9 V, and 12 V, respectively. Rank the bulbs in order of brightness, from brightest to dimmest, assuming brightness is directly proportional to the current through each bulb.