Three equal 1.20μC point charges are placed at the corners of an equilateral triangle with sides 0.800m long. A) The net electric field at the centroid of the triangle is zero. B) The net electric field at the centroid of the triangle is non-zero. C) The net electric potential at the centroid of the triangle is zero. D) The net electric potential at the centroid of the triangle is non-zero.
