A positive point charge (q 7.2 108 C) is surrounded by an
Chapter 19, Problem 19.181(choose chapter or problem)
A positive point charge (q 7.2 108 C) is surrounded by an equipotential surface A, which has a radius of rA 1.8 m. A positive test charge (q0 4.5 1011 C) moves from surface A to another equipotential surface B, which has a radius rB. The work done as the test charge moves from surface A to surface B is WAB 8.1 109 J. Find
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