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ch23_p79 - 79(a At A the only field contribution is from...

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79. (a) At A , the only field contribution is from the +5.00 pC particle in the hollow (this follows from Gauss’ law — it is the only charge enclosed by a Gaussian spherical surface passing through point A , concentric with the shell). Thus, using k for 1 4 0 π ε , we have 12 2 | | (5.00 10 ) (0.5) 0.180 E k = × = G . (b) The direction is radially outward. (c) Point
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