- #1

erisedk

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## Homework Statement

Why are both these problems identical?

In both cases, c>b>a.

Q1 Three concentric conducting shells A, B and C of radii a, b and c are arranged as shown. A dielectric of dielectric constant K is filled between A and B. Find the capacitance between A and C.

Q2 A spherical capacitor is made of two conducting spherical shells of radii a and c. The space between the shells is filled with a dielectric of dielectric constant K unto a radius b as shown. Find the capacitance of the system.

## Homework Equations

## The Attempt at a Solution

Both have answers (4πε

_{o}.Kabc)/(Ka(c-b)+c(b-a))

I know how to do the first one, but I don't understand why both have the same answer, ie. why the capacitance of the system is equal to the capacitance between A and C.