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This question is similar to a question from Matter & Interactions, Vol. II, by Ruth Chabay and Bruce Sherwood.
A hollow ball with radius R = 2 cm has a charge of -4 nC spread uniformly over its surface (Figure 13.47). The center of the ball is at P1 = <-1, 0, 0> cm. A point charge of 6 nC is located at P3 = <5, 0, 0> cm.
(a) What is the net electric field at location P2 = <0, 8, 0> cm?
<[2]
,[2]
,[2]
> N/C
(b) At location P2 draw and label two arrows representing the
electric field due to the ball and the electric field due to the point
charge. The arrows should be in the correct direction; and the relative
lengths of the arrows should be consistent with the relative magnitudes
of the electric fields.
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