A parallel-plate

Given:

A parallel plate capacitor with plates of unequal area and charges on larger and smaller plates are Q₊ and Q_- respectively

Explanation:

When you have two plates of unequal areas facing each other , the electric field is present only in their common area ignoring fringe effects.)

Therefore, charges acquire only on the facing common areas of the plates of the capacitor. So, if the plates have unequal area it doesn’t matter as only the common facing area of both the plates acquire charges

Therefore, we are left with a capacitor with plates area A where A is the common area