Hello all, In Faraday's law we have that the variation of the magnetic flux in time will generate an induced electric field that loops on itself. My question concerns this induced electric field. If we imagine a bar magnet moving through a circular surface and consider the electric field induced on the circle at the boundary of this surface. (Note: the circle may be imaginary or an actual circle made of wire) 1. What is the electric potential of this induced field (measured on the rest frame of the surface) for one complete circular loop? 2. Since it is a loop, if we placed an imaginary test charge on it, what would be the energy that this charge would acquire (or work done to move this charge around the loop)? You can also imagine a superconducting wire with no resistance going around the induced electric field. Basically I don't understand the ideal of an electric field looping on itself. In my mind when we move along an electric field line we must have a delta in the potential. So is this delta in potential uniquely defined? What if I do one lap or two or infinite laps? what would the delta potential be?