Chapter 22 Capacitance, Dielectrics, Electric Energy Storage apacitors are widely used in electronIc circuits Store charges: camera flash; computer if power fails; part of tuner of a radio, sever as memory in RAM, key on keyboard Ke y Movable plate apacitor Insulator (flexible) Fixed plateChapter 22 Capacitance, Dielectrics, Electric Energy Storage Capacitors are widely used in electronic circuits: Store charges: camera flash; computer if power fails; part of tuner of a radio, sever as memory in RAM, key on keyboard