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Felpudio
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Homework Statement
The potential difference Δϕ between the plates of a spherical capacitor is kept constant. Show that then the electric field at the surface of the inner sphere will be a minimum if a=(1/2)b, find that minimum.
Where: a=radius of the inner sphere, b=radius of the outside sphere.
Homework Equations
The potential difference between the plates is [tex]Δϕ=(Q/4πϵ_0)(1/b-1/a)[/tex]
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