Power supply, an apparatus that can provide current to different loads, is of various types, designed to suit the specific needs of different electrical gadgets. A DC (Direct current) power supply obtains energy from the main current source, which supplies AC (Alternating current) current and with the help of the rectifier and transformer present in it, converts the AC current into DC current of lower voltage.
From the battery chargers of your mobile phone to the power supply devices present in televisions and mixers, all belong to the family of DC power supply. An AC power supply on the other hand simply lowers the voltage of the main current with the help of the transformer. A high voltage power supply has an antagonistic action to AC/DC power supply, as it gives an output voltage about
100 times more than that of the input voltage. A high voltage power supply utilizes an amplifier to increase the output voltage by many folds. An uninterruptible power supply, which obtains current from more than one source, performs two jobs simultaneously. Powered directly from the AC mains, it supplies current to the device it is attached to, and simultaneously stores a part of the energy
received in the battery installed within it.
In case of a power-cut, the battery takes up the job of supplying current to the device, thus ensuring long hours of uninterrupted power supply.