Capacitor ndi chipangizo chomwe chimasunga mphamvu zamagetsi ndi mphamvu zomwe zingatheke . Capacitor yosavuta imakhala ndi mbale ziwiri zoyendetsera magetsi kapena mapepala omwe amayikidwa pafupi koma osakhudzana, olekanitsidwa ndi chosungira magetsi kapena vacuum. Kondakitala ndi chinthu chomwe chingathe kuyendetsa magetsi, monga chitsulo, pomwe chosungira magetsi ndi chinthu chomwe sichingathe kuyendetsa magetsi, monga pulasitiki.
Poyamba, ma conductor onsewa sagwiritsa ntchito magetsi. Kuti conductor imodzi ikhale ndi mphamvu yabwino ndipo inayo ikhale ndi mphamvu yoipa, ma elekitironi ayenera kusamutsidwa kuchokera ku conductor imodzi kupita ku ina. Ma elekitironi amakhala pamwamba pa ma atomu ndipo motero amanyamulidwa mosavuta. Ma elekitironi akasuntha kuchokera ku conductor imodzi kupita ku ina, conductor imodzi imakhala ndi ma elekitironi ochulukirapo (kusowa kwa ma proton) motero imakhala ndi mphamvu yoipa, pomwe conductor winayo imakhala ndi ma elekitironi ochulukirapo (ma proton ochulukirapo) motero imakhala ndi mphamvu yabwino. Kufotokozera mwatsatanetsatane kwa njira yochajira capacitor kukukambidwa pankhani yosunga mphamvu zamagetsi mu ma capacitor.
Monga momwe chithunzi cha m'mbali chikusonyezera, mbale imodzi ya conductor ili ndi positive charge (+Q) pomwe mbale ina ya conductor ili ndi negative charge (-Q). Chaji yamagetsi pa mbale iliyonse ndi yofanana koma yosiyana ndi chizindikiro kotero kuti chaji yonse ndi zero (QQ=0). Kupezeka kwa ma chaji amagetsi ofanana ndi chizindikiro pa mbale iliyonse kumapanga kusiyana pakati pa mbale ziwirizi. Conductor yomwe ili ndi positive charge ili ndi mphamvu yamagetsi yambiri pomwe conductor yomwe ili ndi negative charge ili ndi mphamvu yamagetsi yochepa. Mwanjira ina, pali gawo lamagetsi pakati pa ma conductor awiri omwe ali ndi chaji, komwe kutsogolera kwa gawo lamagetsi kumachokera ku chaji yabwino kupita ku chaji yoyipa. Monga tafotokozera pamutu wa mphamvu yamagetsi, ngati pali gawo lamagetsi kapena kusiyana kwa mphamvu yamagetsi pakati pa mbale ziwiri za conductor ndiye kuti payenera kukhala mphamvu yamagetsi pa mbale zonse ziwiri.
Mphamvu yothekera ndi luso logwira ntchito. Ngati capacitor imasunga mphamvu yothekera yamagetsi, imakhala ndi luso logwira ntchito. M'malo mwake, ma capacitor amagwiritsidwa ntchito kwambiri pa moyo watsiku ndi tsiku. Ma capacitor ndi gawo lofunikira kwambiri m'mabwalo amagetsi, omwe ndi maziko a zida zosiyanasiyana zamagetsi.
