Figure 22-47 a shows a nonconducting rod with a uniformly
Chapter 22, Problem 29(choose chapter or problem)
Figure 22-47 a shows a nonconducting rod with a uniformly distributed charge +Q. The rod forms a half-circle with radius Rand produces an electric field of magnitude Eare at its center of curvature P. If the arc is collapsed to a point at distance R from P (Fig. 22-47b), by what factor is the magnitude of the electric field at P multiplied? p +Q p ----0 " f-R--1 (a) (b) Fig. 22-47 29
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