$\left(\mathrm{ii}\right)$ the total energy stored in the system of capacitors given in network of $\mathrm{Fig}. 4.83$. The charging battery has an emf of $4\mathrm{V}.$

 

A parallel plate capacitor of capacitance $100\mu \mathrm{F}$ is charged to $200 \mathrm{V}$. After disconnecting it from the battery, using an insulated handle, the distance between the plates is doubled. Find: 

$\left(\mathrm{i}\right)$ potential difference between the plates and

A parallel plate capacitor of capacitance $100\mu \mathrm{F}$ is charged to $200\mathrm{V}$. After disconnecting it from the battery, using an insulated handle, the distance between the plates is doubled. $\left(\mathrm{ii}\right)$ energy stored in the capacitor, after separation between the plates 

A parallel plate capacitor having a plate area $50{ \mathrm{cm}}^2$ and plate separation of $4 \mathrm{mm}$ is connected to a battery of $12 \mathrm{V}$.

$\left(1.\right)$ Calculate the charge on the capacitor.

A capacitor having a plate area $50{ \mathrm{cm}}^2$ with plate separation of $4 \mathrm{mm}$ is connected to a battery of $12 \mathrm{V}$. Calculate the charge on the capacitor and also calculate additional charge which will be given by the battery to the positive plate if separation is  halved.