In an isolated parallel plate capacitor of capacitance $C$, the four surfaces have charges $Q_1, Q_2, Q_3 \text{and} Q_4$ as shown. The potential difference between the plates is :

Assertion: Increasing the charge on the plates of a capacitor means increasing the capacitance.

Reason: Because $Q=CV\Rightarrow Q\infty C$

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 :- A dielectric slab is inserted between the plates of an isolated charged capacitor. The charge on the capacitor will remain the same.

Reason :- Charge on an isolated system is conserved.

Assertion: Two adjacent conductors carrying the same charge can be at different potentials.

Reason: The conductors may have different sizes and hence different capacitances.

Assertion: When charges are shared between two parallel plate capacitors, a charge of the system is conserved, but some energy is lost.

Reason: During the sharing of charges, some energy is dissipated as heat.

Assertion:- On filling the space between the plates of a parallel plate air capacitor with a dielectric, the capacity of the capacitor is increased.

Reason:- The same amount of charge can be stored at a reduced potential.

Assertion: A parallel plate capacitor is connected across a battery through a key. A dielectric slab of dielectric constant $K$ is introduced between the plates. The energy which is stored becomes $K$ times.

Reason: The potential difference between the plates remains constant or unchanged.

Assertion: When a capacitor is charged by a battery, both the plates receive charges equal in magnitude, no matter whether the sizes of plates are identical or not.

Reason: The charge distribution on the plates of a capacitor is in accordance with the charge conservation principle.