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A positive point charge ( q = +5.62×10−8 C ) is surrounded by an equipotential surface A, which has a radius of rA = 1.66 m. A positive test charge (q0 = +3.12×10−11 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 = −9.39×10−9 J. Find rB. rB =

A positive point charge ( q = +5.62×10−8 C ) is surrounded by an equipotential surface A, which has a radius of rA = 1.66 m. A positive test charge (q0 = +3.12×10−11 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 = −9.39×10−9 J. Find rB. rB =

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A positive point charge ( q = + 5.62 × 10 − 8 C ) is surrounded by an equipotential surface A , which has a radius of r A = 1.66 m . A positive test charge ( q 0 = + 3.12 × 10 − 11 C ) moves from surface A to another equipotential surface B , which has a radius r B . The work done by the electric force as the test charge moves from surface A to surface B is W A B = − 9.39 × 10 − 9 J . Find r B .
r B =
i

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