There is something on Lenz's law about induced current and the magnetic field that I don't quite understand. "Apply Lenz's law that when the magnet is brought near the coil, the magnet's magnetic field through the coil increases, and therefore the flux increases." Here, why the magnet's magnetic field would increase?? No matter if it goes near the coil, I think it keeps the same, instead, the magnetic field created by the current should increase or coming to existence? "The magnetic field of the magnet points upward. To oppose the upward increase, the magnetic field inside the coil produced by the induced current needs to point downward." Here, why the magnetic field in the coil needs to oppose the upward increase??!! "When the magnet is brought far away from th coil, the flux decreases, so th induced current in the coil produces an upward magnetic field through the coil that is 'trying' to maintain the status quo." Again, why it needs to main the status quo? I don't get the purpose of all these. Hope you can explain them to me. Thank you very much.