1. The problem statement, all variables and given/known data Two light bulbs of resistance R1=10 ohms and R2 = 15ohms are connected in series with a 25V battery. Which bulb glows more brightly? Now the bulbs are connected in parallel with the battery. Which bulb now glows more brightly? 2. Relevant equations V=IR 3. The attempt at a solution ...This seems like an easy question, but I just don't understand it! I know if they were the same resistance the brightness of each bulb would be the same, but don't really know why. I thought the amount of current passing through each bulb determined brightness, but then I read that from the Junction rule, the current through each component is the same!