1. The problem statement, all variables and given/known data A uniform electric field has magnitude E and is directed in the negative x-direction. The potential difference between point a (x=0.6m) and at point b(x=0.9m) is 240V. Which point, a or b, is at the higher potential? Explain your answer. 2. Relevant equations 3. The attempt at a solution Since Potential difference between a and b means Va-Vb (which is 240V), I thought that Va=Vb+240 so a should be at higher potential but it's the other way round. What am I doing wrong?