[SOLVED] Kirchoff's Rule on Circuits 1. The problem statement, all variables and given/known data What is the potential difference V_{ab} of point a relative to point b? I found out earlier that the current in the top branch is 0.8 A In the middle is 0.2 A and at the bottom is 0.6A 2. Relevant equations So V = IR - IR 3. The attempt at a solution 3*(0.8) - 4*(0.2) = 1.6V But this isn't working for me...what am I doing wrong?