A capacitor of capacitance 
is charged using a battery of e.m.f. 
, as shown in the figure below.
Switch 
is closed and switch 
is open.
The capacitor is now disconnected from the battery by opening . Calculate the energy stored in the capacitor.
The capacitor is now connected to an uncharged capacitor of capacitance 
by closing . Switch remains open. The total energy now stored in the two capacitors is 
. Suggest why this value is different from your answer in (a).
.
