The figure shows a section of a long, thin-walled metal tube of radius R = 6.15 cm, with a charge per unit length λ = 3.83 x 10^-8 C/m. What is the magnitude E of the electric field at radial distance (a) r = 4.87 cm and (b) r = 15.1 cm.
(a) Number Units
(b) Number Units