A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is
Chapter 22, Problem 71(choose chapter or problem)
A charge of 20 nC is uniformly distributed along a straight rod of length 4.0 m that is bent into a circular arc with a radius of 2.0 m. What is the magnitude of the electric field at the center of curvature of the arc?
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