Hey Pf.. I am trying to understand Lenz's law, but somehow it doesn't make sense. In my book there is some checkpoints execise to test wheather you've understood what you read about, one those checkpoints looks like this. http://snag.gy/NCNLh.jpg I do understand why the current in situation a is the highest since the magnetic field is increasing will it never become zero, and in situation C will the current decrease until become constant (B=0)=> current =0. But why should the current in situation B be as high as in situation A.. ?