Question - What Is The Role Of Capacitor In Ac And Dc Circuit? 
          
        
        Answer - 
        
Role of Capacitor in AC Circuits: In an AC circuit, capacitor reverses its charges as the current alternates and produces a lagging voltage (in other words, capacitor provides leading current in AC circuits and networks).
Role and Performance of Capacitor in DC Circuit.
In a DC Circuit, the capacitor once charged with the applied voltage acts as an open switch.