Koronto-magnetism-ka, xadiga korontadu ee dhexmarta qayb kasta oo ka mid ah qayb kasta oo ka mid ah kirishtaanka halkii halbeeg waxa loo yaqaan xoojinta hadda, ama si fudud hadda korontada. Astaanta hadda jirta waa I, unuguna waa ampere (A), ama si fudud "A" (André-Marie Ampère, 1775-1836, phys French...
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