Here is my problem I am having: I am having trouble seeing how current is step down in a transformer when the voltage increase. This is how I see it. In a battery ( I know d.c just using as example. ) The voltage is basically an electric field created by the internal circuit in the battery, so the work done on the electrons to give them the energy to move from a low to a high potential is done by the battery, so a 12V energy is given to each Colombo of charge so the current would flow at X amount, but if you wanted to increase current flow you would increase the voltage so more energy is given to each Colombo of charge mean they move fast so to speak, I do realize that electrons don't move that quick, it the effect of the electric field throughout the conductor (hope I am right saying that). But when I look at a A.C transformer e.g step up the voltage has increased but the current has decreased, why is this? could someone please explain. I do apologize if some of the information I put is incorrect, I am self taught, so I can only quote what I have read so far.