A capacitor of capacitance ‘C’ is charged with $\text{'}{\mathrm{Q}}_0\text{'}$ now it connected across a battery of e.m.f $\mathrm{V}=\frac{{\mathrm{Q}}_0}{\mathrm{C}}$ such that positive plate of capacitor connected with –ve end of battery and –ve plate with +ve end of battery then find energy supplied by battery before steady state condition obtained to capacitor is: