Apo AC mafambiro inopfuura nepawaya, imwe tsinhano yemagineti chido kugadzirwa kutenderedza waya. Iyo yemukati chikamu chese conductor mune alternating magineti inoburitsa induced mafambiro. Nekuti rudzi urwu rwekufemerwa ikozvino runoita yakavharwa loop mukati meconductor yese, senge mhepo yemvura, inonzi. Eddy current. Eddy yazvino haingorase simba remagetsi, kuderedza kushanda kwemidziyo yemagetsi, asi zvakare kukonzera kupisa kwemidziyo yemagetsi (senge transformer core), izvo zvinokanganisa kushanda kwakajairika kwemidziyo mumatambudziko akakomba.