# Illustration Electric Field Inside and Outside (Graph) - Solid Cylinder

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Graph of the electric field $$E$$ of a homogeneously charged solid cylinder as a function of the perpendicular distance $$r$$ to the longitudinal axis of the cylinder.

The solid cylinder has the radius $$R$$:

• Outside ($$r \gt R$$) of the solid cylinder the E-field drops with $$1/r$$.
• Inside ($$r \lt R$$) of the solid cylinder the E-field increases linearly.