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Xaiv Cov Lim Ntau Yam
Raws li cov yam ntxwv ntawm qhov cuam tshuam, qhov ntau zaus, qhov hluav taws xob thiab impedance thiab lwm yam tsis zoo thiab cov yam ntxwv ntawm kev thauj khoom, kev xaiv tsim nyog ntawm cov ntxaij lim dej, feem ntau xav txog: Rau ib qho, nws yuav tsum muaj cov khoom siv electromagnet ...Nyeem ntxiv
