Acapacitor,usuallyreferredtoasitscapacitytoholdcharges,isexpressedintheletterc.Definition1:acapacitor,asitsnameimplies,isa'containerforcharging',adevicethatholdscharges.Englishname:capacitor.Capacitorisoneofthewidelyusedelectroniccomponentsinelectronicequipment.Itiswidelyusedinintersecting,coupling,bypass,filtering,tuningloop,energyconversion,controlandsoon.Definition2:capacitors,anytwoinsulatedandcloselyspacedconductors(includingconductors)thatformacapacitor.Capacitorsaredifferentfromcapacitors.Thecapacitanceisthebasicphysicalquantity,thesymbolisc,andtheunitisf(Farah).)