Assertion: The capacitance of a capacitor depends on the shape, size and geometrical placing of the conductors and its medium between them.

Reason: When a charge $q$ passes through a battery of emf $E$ from the negative terminal to an positive terminal, an amount $qE$ of work is done by the battery.

Assertion : If three capacitors of capacitance $C_1<C_2<C_3$ are connected in parallel then their equivalent capacitance $C_p>C_s$

Reason : $\frac{1}{C_p}=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}$

Assertion : The force with which one plate of a parallel plate capacitor is attracted towards the other plate is equal to square of surface density per $\epsilon$ per unit area

Reason : The electric field due to one charged plate of the capacitor at the location of the other is equal to surface density per $\epsilon$

Three capacitors, each of capacitance $C$ and of breakdown voltage $V$ are joined in series. The capacitance and breakdown voltage of the combination will be 

A parallel plate  capacitor has uniform electric field  $E$ in the space between the plates.If the distance between the plates is $d$ and area of each plate is  $A$, the energy stored in the capacitor is ;