# Capacitor of different plate dimensions

1. Is it possible to calculate the capacitance of a system where the top plate has the dimension d1 and the bottom plate has a dimension d2 and d1<<d2. Now, the difference between the plates are t. Is it possible to calculate the capacitance of this system where the dielectric is oil?

2. In one of the thread here namely "Capacitance of two different circular plates" (last post June, 08), I got some basic idea from this thread but they consider air as dielectric, while in my case dielectric is oil. Also I need a mathematical computation guideline for this capacitor system

## The Attempt at a Solution

You can assume that not all of the bigger plate contributes. The part of the bottom (bigger) plate directly below the top plate would only contribute. So, it is just like a capacitor of plates with dimensions as that of the smaller plate.

This comes from the assumption that that field due to the capacitor plates are like those due to an infinite plane. If not, then it'd be messy.

What happens to the field in a dielectric?