Dab tsi yog "electrostatic nqus nyhuv" ntawm DC
Nyob hauv DC hluav taws xob, cov roj teeb ntim hauv cov huab cua tau ntxim nyiam rau saum npoo ntawm qhov rwb thaiv tsev los ntawm kev ua ntawm qhov kev taw qhia tas mus li hluav taws xob. Qhov no yog "hluav taws xob cov nyhuv" ntawm DC. Vim tias nws txoj haujlwm, thaj tsam saum npoo ntawm DC insulator tuaj yeem ntau dua ob zaug ntawm AC voltage nyob hauv tib puag ncig ib puag ncig. Raws li qhov nce ntawm qhov paug tsis huv, qib ntawm rwb thaiv tsev txo qis, thiab smudging ntawm rwb thaiv tsev yooj yim tshwm sim nyob rau hauv qee yam huab cua. Yog li ntawd, vim tias cov yam ntxwv ntawm DC hluav taws xob kis kab, cov yam ntxwv sab nraud rwb thaiv tsev muaj cov nyom ntau dua li cov ntawm AC kis kab.