October 7, 2015

Homework Help: Physics

Posted by Anonymous on Thursday, September 12, 2013 at 5:35pm.

A positive point charge (q = +5.4 10-8 C) is surrounded by an equipotential surface A, which has a radius of rA = 1.5 m. A positive test charge (q0 = +4.8 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 = -7.7 10-9 J. Find rB.

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