Hi! I'm a new face here and have an easy question. I know how to calculate induced current when magnet moves through coil (it's E=BLv) but how do you calculate how much a magnet will decelerate when it goes through the coil? Will it decelarate at all? I have one of those mechanically-powered flashlights and the magnet won't slow a bit probably because the strength of magnetic field isn't so great. Thanks.