(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A charge of 9 nC is uniformly distributed around a ring of radius 10 cm that has its center at the origin and its axis along the x axis. A point charge of 1 nC is located at x = 1.25 m. Find the work required to move the point charge to the origin. Give your answer in both joules and electron volts.

2. Relevant equations

since it's a ring we can get an approximate answer if we treat the ring as a point charge at the origin or we can use v=kQ/(z^2+a^2)^.5 where z=1.25 a=.1

W=q*v

3. The attempt at a solution

w=(10^-9)(9x10^9)(9x10^-9)/(1.25^2+.1^2)^.5

which give me 6.5e-8 but the answer wasn't that.

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# Work required to move charge

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