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Why DC excitation is used for alternators? Why cant it be AC?

Answer Posted / alok verma

dc excitation is used for the alternators coz,DC IS CONSTNT IN MAGNITUDE ND IT HAS LINEAR GRAPH AND THERE4 THERE WILL BE MAX CUTTING OF FLUX...
(YAAR jisko jo maan me aa raha hai likh raha hai,so ah ikha karo)

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