ʻO ka capacitor kahi mea hana e mālama ai i ka hoʻouku uila a me ka ikehu hiki . ʻO ka capacitor maʻalahi he ʻelua mau papa alakaʻi a i ʻole nā pepa i kau ʻia kokoke akā ʻaʻole e pili ana, i hoʻokaʻawale ʻia e kahi insulator a vacuum paha. ʻO ka conductor kahi mea hiki ke alakaʻi i ke au uila, e like me ka metala, ʻoiai ʻo ka insulator kahi mea hiki ʻole ke alakaʻi i ke au uila, e like me ka plastic.
I ka wā mua, ua kūlike ʻole nā alakaʻi ʻelua i ka uila. I mea e hoʻopiʻi maikaʻi ʻia ai kekahi alakaʻi a hoʻopiʻi maikaʻi ʻole kekahi, pono e hoʻoili ʻia nā electrons mai kekahi alakaʻi i kekahi. Aia nā electrons ma luna o ka ʻili o nā ʻātoma a no laila ua maʻalahi ka lawe ʻia ʻana. Ma hope o ka neʻe ʻana o nā electrons mai kekahi alakaʻi a i kekahi, loaʻa i kekahi alakaʻi kahi keu o nā electrons (ka nele o nā protons) a no laila lilo i mea hoʻopiʻi maikaʻi ʻole, ʻoiai ʻo kekahi alakaʻi he keu o nā electrons (ka keu o nā protons) a no laila lilo i mea hoʻopiʻi maikaʻi ʻole. Kūkākūkā ʻia kahi wehewehe kikoʻī o ke kaʻina hana o ka hoʻopiʻi ʻana i kahi capacitor ma ke kumuhana o ka mālama ʻana i ka ikehu uila i loko o nā capacitors.
E like me ka mea i hōʻike ʻia ma ke kiʻi ʻaoʻao, ua hoʻopiʻi maikaʻi ʻia kekahi o nā papa alakaʻi (+Q) ʻoiai ua hoʻopiʻi maikaʻi ʻole ʻia kekahi papa alakaʻi (-Q). ʻO ka nui o ka hoʻopiʻi uila ma kēlā me kēia papa he like ia akā ʻokoʻa i ka hōʻailona i ʻole ka huina o ka hoʻopiʻi (QQ=0). ʻO ke alo o nā hoʻopiʻi uila o ka nui like a me ke kūʻē i ka hōʻailona ma kēlā me kēia papa e hana ai i kahi ʻokoʻa hiki ma waena o nā papa ʻelua. ʻOi aku ka kiʻekiʻe o ka hiki uila o ke alakaʻi i hoʻopiʻi maikaʻi ʻoiai ʻoi aku ka haʻahaʻa o ka hiki uila o ke alakaʻi i hoʻopiʻi maikaʻi ʻole. I nā huaʻōlelo ʻē aʻe, aia kahi kahua uila ma waena o nā alakaʻi ʻelua i hoʻopiʻi ʻia, kahi e hele ai ke kuhikuhi o ke kahua uila mai ka hoʻopiʻi maikaʻi a i ka hoʻopiʻi maikaʻi ʻole. E like me ka mea i kūkākūkā ʻia ma ke kumuhana o ka ikehu hiki uila, inā he kahua uila a i ʻole ka ʻokoʻa hiki uila ma waena o nā papa alakaʻi ʻelua a laila pono ka ikehu hiki uila ma nā papa ʻelua.
ʻO ka ikehu hiki ke hana i ka hana. Inā mālama kahi capacitor i ka ikehu hiki ke hana uila, loaʻa iā ia ka hiki ke hana i ka hana. ʻO ka ʻoiaʻiʻo, he nui nā hoʻohana o nā capacitors i ke ola o kēlā me kēia lā. He ʻāpana koʻikoʻi nā capacitors i nā kaapuni uila, ʻo ia ke kumu o nā mea uila like ʻole.
