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perfectionist
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Homework Statement
A capacitor is formed of two concentric spherical conducting shells of radii r1 and r3. The space between the shells is filled from r1 to r2 with a dielectric of relative permittivity [tex]\epsilon[/tex]r1 and from r2 to r3 with a dielectric of relative permittivity [tex]\epsilon[/tex]r2. Derive an expression for the capacitance of this capacitor.
Homework Equations
C = Q/V
The Attempt at a Solution
I know that the dielectric reduces the E. But i seriously do not know where to start from.