$A$ capacitor of capacity $50\,\mu F$ is charged to $10\;V$. Its energy is equal to:

On increasing the plate separation of a charged condenser,the energy

$A$ parallel plate capacitor has a uniform electric field $E \ (V/m)$ in the space between the plates. If the distance between the plates is $d \ (m)$ and the area of each plate is $A \ (m^2)$,then the energy (joules) stored in the capacitor is:

Two capacitors of capacitance $2 \ \mu F$ and $4 \ \mu F$ are connected in series. If a potential difference of $10 \ V$ is applied across this combination,what will be the ratio of the energy stored in these capacitors?

Obtain the expression for the energy stored per unit volume in a charged capacitor.

Work done by an external agent in separating the plates of a parallel plate capacitor (disconnected from the battery) is: