Kwiisekethe ze DC, i Capacitor Isithebe ifana nekhefu kwaye yenza isiphaluka evulekile. I-disk drive ye-disc enye yezona zinto ziqhelekileyo zixhobo zecomputer, kwaye liyinxalenye yokugcina umrhumo. Zonke ezi ngenxa yesakhiwo se-capacitor, nokuba yinto elula kakhulu iya kuba nabaqhubi bamandla ombane abahlukaniswe ngabaqhubi beeseleli (kuquka i-air). Ngoko emva kokutshatyalaliswa, phakathi kwama-electrode amabini e-capacitor kuya kubumba umehluko okhoyo (umbane, njenge Ukukhutshwa kwamandla ombane), kwaye ayikwazi ukuba ngumbane waloo baqhubi be dielectri phakathi. Kodwa ikhona kuphela kwimeko yokungafihli umbane wokuphazamiseka. Siyazi, nayiphi na into engabonakaliyo, xa i-voltage kulo mbandela ibe nexabiso elithile, inokuqhuba, kwaye le mandla siyibiza ngokuthi i-voltage power. Ngaphandle kokungabikho, xa i-capacitor iyaphuka, akusiyo i-insulator. Nangona kunjalo, esikolweni esiphakathi, loo mandla ayikwazi ukubonwa kwisiphaluka, wonke umsebenzi owenzayo ngaphakathi kwimizi yokuphuka, ukuze i-capacitor ingagwetywa njenge-insulator.
 　　
Ngocwangciso lwe-AC, nangona kunjalo, kuba ulawulo lwangoku luguqulwa ngokusebenza ngexesha, ukutshaja nokukhupha i-capacitor ifuna ixesha, kwaye indawo yombane eguquguqukayo yenziwe phakathi kwama-electrode amabini, kwaye le ntsimi yombane yatshintshile kunye nexesha ekusebenzisaneni. Enyanisweni, ukupasa kwamanje i-capacitor ngendlela yendlela yombane. Esikolweni esiphakathi, ukuvalela okwangoku ngoku ngokuvumela ukuhamba okukhoyo kudlulise intsingiselo efanayo.