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The figure on the left displays a grounded conductor at V equals 0 and sigma equals infinity. A thin cylindrical object above the plane is labeled rho sub l and a volume is labeled rho sub v.

The figure on the right of equivalent distributions display a dashed line at V equals 0. A thin cylindrical object, labeled rho sub l and a volume rho sub l are above the line and similar objects are below the line labeled, negative rho sub l and negative rho sub v.