1. The problem statement, all variables and given/known data What is the potential difference between points a and b in the diagram? http://imgur.com/Ubr4A 2. Relevant equations 3. The attempt at a solution I have calculated the currents to be: I1=0.30A I2=0.65A I3=0.35A What I tried doing was (0.30*5) - 0.35= 1.15 V but it's not right. Any help?