A positive charge +Q is uniformly distributed on the upper half of a semicircular rod, and a negative charge -Q is uniformly distributed on the lower half. The radius of curvature of the rod is R. Point P is located at the center if the rod made a complete circle (equi-radii from the semicircle at Point P)
A) What is the direction of the electric field at P due to the charge +Q on the top half of the rod?
B) What is the direction of the electric field at P due to the charge -Q on the bottom half of the rod?
C) What is the direction of the net electric field at point P?