السلام عليكم ورحمة الله وبركاته ....
عندى سؤال بس شكله رخم شوية ...
copper wire 44m long , its is wounded around cylindrical iron rod of permeability 0.002weber/A.m , its lenght is 10cm . calculate the e.m.f induced if the electric changes from 20amperes to zero through half second