Two short poles of length d lie along the x axis, the separatingdistance between the centers of the poles is d + a (a > 2d).Each pole carries a positive charge q distributed uniformly alongits length.
(a) Derive a formula for the electric field produced bythe left pole at points along the x-axis where the left pole is.
(b) Derive a formula for the electric force exerted by one rod onthe other. Please give some explaination.