Answer / er. ankush miglani 9718151073

IF WE CONNECT THE +VE POLARITY TO THE EARTH AND -VE TO THE
EQUIPMENT THE VOLTGE IS CALLED -VE DC VOLTAGE.
THE POSITIVE POLARITY ACQUIERS THE CORROSION VERY QUICKLY
AND TO MAINTAIN THE VOTAGE OF THE DEVICE UNDER
SPECIFICATIONS IT IS DONE.

Answer / sadat khan

we use -48voltd.c instead 0f +48voltd.c because all
problems like fluctuvation,surges all occur in possitive
wire not in negative wire.

As we know diode work on both negative and positive but converting ac into DC we have to given a/c from negative of diode or positive side.please give me answer.

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