In Fig. 22-64a, a particle of charge #Q produces an
Chapter , Problem 65(choose chapter or problem)
In Fig. 22-64a, a particle of charge #Q produces an electric field of magnitude Epart at point P, at distance R from the particle. In Fig. 22-64b, that same amount of charge is spread uniformly along a circular arc that has radius R and subtends an angle u. The charge on the arc produces an electric field of magnitude Earc at its center of curvature P. For what value of u does Earc ! 0.500Epart? (Hint: You will probably resort to a graphical solution.)
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