As nouns the difference between transformer and adaptor
is that transformer
is something that transforms, changing its own or another thing's shape while adaptor
Something that transforms, changing its own or another thing's shape.
(electrical engineering) A static device that transfers electric energy from one circuit to another by magnetic coupling. Their main use is to transfer energy between different voltage levels, which allows choosing most appropriate voltage for power generation, transmission and distribution separately.
* shape change
* power adaptor