Positive charge Q is distributed uniformly along the xaxis from x = 0 to x = a. A positive point charge q is located on the positive x-axis at x = a + r, a distance r to the right of the end of Q. Required:
a. Using integral calculus, calculate the electric field produced by the charge distribution Qat all points x>a.
b. What is the force on the small charge q.
c. If r>>a, what is the force on q?