1, Taw qhia rau lub hauv paus ntsiab lus ntawm transformer Transformer raws li lub npe implies, hloov qhov voltage ntawm lub hwj chim apparatus.Nws yog kev siv Faraday electromagnetic induction txoj cai los hloov AC voltage ntaus ntawv, feem ntau yog los ntawm thawj kauj, hlau core, sec ...
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