1. The problem statement, all variables and given/known data This isn't a homework problem but I am very curious. How much voltage can a magnetic, about the size of a fist, generate by passing through a solenoid with about 3 loops every centimeter with being pulled by a tension of 1000 N over a distance of 2 meters. 2. Relevant equations Lenz's law (a force that will slow down the acceleration) ε= (-N)(dI/dt) 3. The attempt at a solution I am asking this because I do not know how to solve for dI (give me an average value for a large magnet the size of a fist) and I do not know how much time this will take.