1. Find the electric field magnitude midway through thenonconducting wall of a thick-walled pipe of infinite length withinner radius w, outer radius 3w, and a uniform volumetric chargedensity Ï. Answer in terms of the permittivity.
2. Find the electric field strength due to two completely hollow,concentric spherical shells made of metal. The inner shell has aradius w and carries a uniform surface charge density -σ. The outerhas radius 2w and uniform charge density +4σ. Answer in terms ofepsilon, and find the result first at a distance r from the center(w2w). You mayfind the answers interesting.
