A capacitor of capacitance C = 900 pF is...

A capacitor of capacitance `C = 900 pF` is charged fully by 100V battery B as shown in figure (a). Then it is disconnected from the battery and connected to another uncharged capacitor of capacitance `C=900pF` as shown in figure(b). The electrostatic energy stored by the system (b) is:

`4.5 x 10^-6 J`

`3.25 x 10^-6 J`

`2.25 x 10^-6 J`

`1.5 x 10^-6 J`

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