Q. How does an AC to DC transformer work?

As the term indicates AC to DC transformer is a transformer that is connected to an AC rectification circuit and with the increase or decrease of the AC voltage the rectification circuit converts the AC voltage to DC voltage. In simple terms an AC to DC transformer is an absolute day-to-day solution to power electronics from the AC mains. In many devices you will find AC to DC transformers in the form of an adapter that plugs into the mains socket.