In our present life, we use most of the electronics items and all these items required the DC supply for the operation. Therefore one of the basic and primary purposes of the rectifier is to convert AC power into DC power. These are also used for the amplitude modulated radio signal detection. For the purpose of welding these are used for supplying polarized voltage. At last but not least, without rectifier there is no existence of the electronic devices that run on AC supply rather than battery.