1. The problem statement, all variables and given/known data On the right bottom side ,when the switch is closed the equation is given V(EG)= +V+V(FG) The photo is attached 2. Relevant equations Concept 3. The attempt at a solution What is the difference between the back emf in the inductor and the p.d across the inductor? I think the current flow from E to G, the p.d. due to its resistance should be in opposite sign with the back emf in the inductor, but they are in the same sign as shown. Please explain.