If $Q$ is the charge on the plates of a capacitor of capacitance $C, V$ the potential difference between the plates, $A$ the area of each plate and $d $ the distance between the plates, the force of attraction between the plates is
$\frac{1}{2}\,\,\left( {\frac{{{Q^2}}}{{{\varepsilon _0}\,A}}} \right)$
$\frac{1}{2}\,\,\left( {\frac{{C{V^2}}}{d}} \right)$
$\frac{1}{2}\,\,\left( {\frac{{C{V^2}}}{{A\,{\varepsilon _0}}}} \right)$
$A$ and $B$ both
If the charge on a capacitor is increased by $2$ coulomb, the energy stored in it increases by $21\%$. The original charge on the capacitor is....$C$
If there are $n$ capacitors in parallel connected to $V$ volt source, then the energy stored is equal to
Work done by an external agent in separating the parallel plate capacitor is
If the potential of a capacitor having capacity of $6\,\mu F$ is increased from $10\, V$ to $20\, V$, then increase in its energy will be
Obtain the expression for the energy stored per unit volume in a charged capacitor.