The figure (a) shows a nonconducting rod with a uniformly distributed charge Q. The rod forms a half-circle with radius R and produces an electric field of magnitude Earc at its center of curvature P. If the arc is collapsed to a point at distance R from P (Figure (b)). by what factor is the magnitude of the electric field at P multiplied? +Q +Q P R (a) (b) 1.25 1.76 O 1.57 O 2.00 O 0 Previous Next