A positive point charge (q = +6.99 x 10^(-8) C) is surrounded by an equipotential surface A, which has a radius of rA = 2.63 m. A positive test charge (q0 = +3.62 x 10^(-11) C) moves from surface A to another equipotential surface B, which has a radius rB. The work done by the electric force as the test charge moves from surface A to surface B is WAB = -8.22 x 10^(-9) J. Find rB.
U = k q1q2 ( 1/ rb - 1/ ra)
- 8.22* 10^-9 = 9* 10^9* 6.99* 10^-8* 3.62* 10^-11* (1/ rb - 1/2.63)
rb = 51.864
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A positive point charge (q = +6.99 x 10^(-8) C) is surrounded by an equipotential surface...
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