Consider a long, thin, plastic cylindrical shell centered at theorigin. It has a radius 2R and a linear charge density -3 λ .
b. Use Gauss's Law to find the electric field (mag anddirection) at a distance x=3R from the origin.
Now a long line of charge (parallel to the axis of the cylinder)is added at a distance x=4R with linear charge density + λ .
c. use superposition to find the force (mag. and direction) onan electron placed at x=3R
