The energy of a charged capacitor resides in

Two capacitors,one of capacity $C$ and other of capacity $C/2$ are connected to a $V$ volt battery,as shown in the figure. The work done in charging fully both the capacitors is

Three identical capacitors are combined in different ways. For the same voltage applied to each combination,the one that stores the greatest energy is:

What is the average electric energy density between the plates of a charged capacitor? (Here,$q$ = charge on the capacitor and $A$ = area of the capacitor plates.)

$A$ capacitor of capacitance $C$ has stored energy $W$ and charge $Q$. If the charge is increased to $2Q$,what will be the new stored energy?

$A$ $12 \text{ pF}$ capacitor is connected to a $50 \text{ V}$ battery. The electrostatic energy stored in the capacitor will be . . . . . . $\text{J}$.