I have a problem: In EM induction, when we increase the number of turns in a coil, the induced e.m.f will increase, thus the current. Why does the current also increase? But in operating a transformer, when the voltage of the output current increases, the current decreases. How come? The e.m.f. of the output current becomes larger, isn't it the same case as above that the current would also be increased? In motional induction, when the induced e.m.f. increases, the current increases. Why does only the e.m.f increase in mutual induction?