GENERAL KNOWLEDGE

Detailed explanation-1: -The positive and negative charges on each of these plates attract each other, because that’s what opposite charges do. But, with the dielectric sitting between them, as much as they want to come together, the charges will forever be stuck on the plate (until they have somewhere else to go).

Detailed explanation-2: -in case of capacitor, we have opposite polarities (positive in one plate and negative on another plate) to create electric field because capacitor stores energy in form of electric field. so the parallel plates of capacitor have opposite polarities and hence the opposite charge density.

Detailed explanation-3: -Do capacitors store charge? Capacitors do not store charge. Capacitors actually store an imbalance of charge. If one plate of a capacitor has 1 coulomb of charge stored on it, the other plate will have −1 coulomb, making the total charge (added up across both plates) zero.

Detailed explanation-4: -Electrical current can not actually flow through a capacitor as it does a resistor or inductor due to the insulating properties of the dielectric material between the two plates. However, the charging and discharging of the two plates gives the effect that current is flowing.