A uniform line charge extends from x = 2.4 cm to x = + 2.4 cm and has a linear charge density of λ = 6.4 nC/m.
(a) Find the total charge.
(b) Find the electric field on the y axis at the following distances: y = 4 cm, y = 12 cm, and y = 4.5 m.
(c) Find the field at y = 4.5 m, assuming the charge to be a point charge.