An infinitely long, uniformly charged, insulating, solid
cylinder, with radius R has spher-
ical holes cut into it of radius a < R along its axis. The
cylinder is placed with its axis along
the z − axis. These holes have centers at z = 0, ±d, ±2d, . .
. ± nd with d > 2a and n run-
ning to ∞. Calculate the electric field from the cylinder at a
distance r > R on the x, y...