Unformatted text preview: longer zero but is . ) ( 4 1 4 1 4 1 r Q q πε r Q πε r q πε V-=-= All potentials inside the outer shell are just shifted by an amount . 4 1 b r Q πε V-= Therefore relative potentials within the shells are not affected. Thus (b) and (c) do not change. However, now that the potential does vary outside the spheres, there is an electric field there: . 1 2 -= -+ ∂ ∂-= ∂ ∂-= q Q r kq r kQ r kq r r V E...
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- Electric charge, rA rB, oppositely charged point