A charge of 3.45 µC is uniformly distributed on a ring of radius 9.5 cm. Find the electric field strength on the axis at the following locations. (a) 1.2 cm from the center of the ring N/C (b) 3.1 cm from the center of the ring N/C (c) 4.0 m from the center of the ring N/C (d) Find the field strength at 4.0 m using the approximation that the ring is a point charge at the origin. N/C (e) Compare your results for parts (c) and (d) by finding the ratio of the approximation to the exact result.