emf induction.... Why does a moving conductor becomes induced with an emf? Well I know it has to do something with changing magnetic flux. The thing I want to know is why the changing magnetic flux leads to e.m.f. induction? Secondly, we have an A.C. generator in which the coil is rotated to produce the current. I'm given the task to connect a fuse to one of the wires leading out of the generator. How would I which one is live wire and which one is neutral considering that the direction of the currect is continuosly changing? Thanks in advance for any help.