I am having some trouble understanding why and how the emf changes when a bar magnet is dropped into a solenoid. As the magnet moves down (have not entered the solenoid yet) it experences an increase in magnetic field. As it enters the magnet it experiences an increase in magnetic still until it has entered all the way. At which, now at the back there is a decrease in magnetic field while at the front there is an increase, however because in the front there are more field lines overall it is still a increase. Once, it reaches the middle there is no everall change in magnetic field. As it drops down further, i am clueless on what happens. I think that since there are now more coils at the back, so overall there is a decrease in magnetic field. Here is a diagram of what i think: http://i.imgur.com/feMhv.png Thanks for the help!