How does a step-up and step-down transformer work?
A transformer is made from two or more coils of wire wound
around an iron core. When some voltage is applied to one of the
coils it magnetizes the iron core, which induces a voltage in the
other coil. There is a turns ratio where of the two sets of
windings determines the amount of voltage transformation.
a step up transformer makes a voltage higher than before it does
this by having more turns on the secondary coil then the primary
a step down transformer makes a voltage lower then it was before
it reaches it, it does this by having less turns on the secondary
coil then the primary coil.