I decided to join this forum because we were baffled on the following fact made by a professor. We were hoping to get this cleared up here, since the prof said the math was complicated. Let's assume any arbitrary circuit (forming an area) moving at velocity v through a perpendicular field B to the plane of the area of the circuit. Now, the change in magnetic flux is 0 in constant v. However, it was pointed out that it is not 0 in any acceleration. Our prof pointed out that it can be imagined as an increasing area as a magnetic lawnmower increases in speed. How are the mathematics applied to this sort of problem? Thank you!