Change in flux of a transformer

[AbsoluteZer0]

Hello,

As I understand, a simple transformer works by using the Input AC in the primary coil to generate magnetic field in the iron core, which then generates an AC in the secondary coil. My question is: how does this process change the voltage? I've searched for answers on other websites but I haven't found a clear explanation.

Thanks,

 

[milesyoung]

For an ideal transformer, this:
http://en.wikipedia.org/wiki/Transformer#Induction_law

might give you the general idea. Perhaps it's something more specific you're having trouble with?