A capacitor of capacitance C is given a charge Q. At t = 0, it is connected to an ideal battery of emf E through a.' resistance R. Find the charge on the capacitor at time t.
The capacitor is given a charge Q. It will discharge and the capacitor will be charged up when connected with battery.
Net charge at time t = Qe-t /RC +Q(1- e-t /RC ) .
