Nkebi ahịrịokwu 1: Ma brek electromagnetic na brek eddy ugbu a na-eji ike electromagnetic, ma brek magnetik na-adabere na friction na brek eddy ugbu a na-eji ike electromagnetic eme ihe. Nkebi ahịrịokwu 2: Ma brek electromagnetic na brek eddy ugbu a na-eji ike electromagnetic, ma brek magnetik na-adabere na friction na brek eddy ugbu a na-eji ike electromagnetic eme ihe ozugbo. Ajụjụ: Ọ̀ bụ otu ihe ka ahịrịokwu nke mbụ na nke abụọ pụtara? Ee ma ọ bụ Ee e?
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