1. Assume that an observer calculates electric field and potential by measuring the force on a test charge.

This observer moves along the path described by the green arrow. Finally, assume the system is in vacuum.

(a) Plot and justify Q, E, V for a uniformly charged cylinder of P3D, height h, radius ro where h >> ro.

The path goes through the center of the prism and is perpendicular to it. Let us assume V = 0 is

defined at distance 1₁.

(b) Suppose the observer is far enough away that z » h. Discuss whether it is appropriate to express

E, V as if the charge were a point charge.