Question

The capacitance of capacitor of plate areas a1 and a2 at a distance d is

Answer 1

Answer:

Suppose there is a parallel-plate capacitor but the two plates have different areas, A1 and A2. How will we derive an expression for its capacitance?

I have been told to take the area common between the two, but from where does this follow?

Ideally we start off by assuming that one plate has +Q charge and the other has −Q. Then we find that the potential difference V is directly proportional to Q, from which we find capacitace C.

I am unable to find the potential difference.