I was looking at an example problem the Organic Chemistry tutor did, where he is finding the magnitude and sign of the potential difference between two points at different levels of potential. The problem is below.
I do not understand how he got that Vab is 7V, and not -7V. I believe that Electric field should be parallel to, and in the same direction as, conventional current here. From electromagnetism, we know that if the path traversed (here it is A to B) and electric field are in the same direction, then our resultant deltaV value is negative. The formula for this is below.
So why did he get a positive potential difference value here?