The difference between rectifiers and transformers
Rectifier (English: rectifier) is the exchange of alternating current into direct current devices, can be used for power supply devices and detect radio signals. The rectifier can be made of a vacuum tube, a pilot tube, a solid-state silicon diode, a mercury arc, or the like. In contrast, a set of devices that convert DC into alternating current is called an "inverter".
Ordinary ballasts and transformers are the same principle, are made using electromagnetic induction principle, but the function is different, one used to limit the current, one is used to change the voltage size.
Fluorescent lamp ballast is because it starts with high current and high voltage, to be activated, only a lower voltage and a smaller current to maintain its working condition, it must be ballast. Other transformers are due to their rated voltage range, to be adjusted
