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## Homework Statement

A capacitor is formed by 2 square metal plates of edge

*a*and separated by distance

*d*. Dielectrics of dielectrics constants K

_{1}and K

_{2}are filled in the gap as shown.

**2. The attempt at a solution**

This was my initial approach:

I integrated the parallel combination of elemental capacitors dC

_{1}and dC

_{2}, but I didnt get the correct answer.

Next, I tried taking the elemental capacitors in

**series**instead of parallel:

This time my answer turned out to be correct.

Can someone help me identify the flaw in my initial approach? I suspect I was wrong in assuming that the elemental capacitors

**were**in parallel in the first place.

Opinions?

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