1. The problem statement, all variables and given/known data Three 80.0 W, 135 V lightbulbs are connected across a V = 135 V power source, as shown in Figure P18.48. (Assume that the resistance of each bulb is constant even though, in reality, the resistance increases markedly with current.) http://www.webassign.net/sercp/p18-48alt.gif (a) Find the total power delivered to the three bulbs. W (b) Find the potential difference across each light bulb. deltaVR1 = V deltaVR2 = deltaVR3 = 2. Relevant equations I^2R = P DeltaV = IR DeltaV/I = R p/v = I 3. The attempt at a solution The first thing I did was find the current which is 80/135 = .5925. From this I found the resistance which is 135/.5925 = 227.85 ohm. From there I tried using the formula I^2R= P, which gave me the incorrect answer. Then I thought since R2 and R3 are parallel I can combine it by using the formula 1/R = 1/R1 + 1/R2. But that got me a bit confuse and still gave me an incorrect answer. I am not sure where to start and what steps I am doing wrong or missing. Any help would be great.