For points far from the ends of the cylinders determine the

Question

A thin cylindrical shell of radius R₁=5.8cm is surrounded by a second cylindrical shell of radius R₂=9.4cm, as in the figure. Both cylinders are 15m long and the inner one carries a total charge Q₁=-0.79 μC and the outer one Q₂=+1.49 μC.

a) For points far from the ends of the cylinders, determine the electric field at a radial distance r from the central axis of 1.8cm?

b) For points far from the ends of the cylinders, determine the magnitude of the electric field at a radial distance r from the central axis of 6.8cm?

c) For points far from the ends of the cylinders, determine the magnitude of the electric field at a radial distance r from the central axis of 12.6cm?