ch23_p18 - 18. Eq. 23-6 (Gauss law) gives = qenc. (a) The...

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18. Eq. 23-6 (Gauss’ law) gives ε ο Φ = q enc . (a) The value Φ = – 9.0 × 10 5 (in SI units) for small r leads to q central = – 7.97 × 10 6 C or roughly – 8.0 µ C. (b) The next (non-zero) value that Φ takes is +4.0 × 10 5 (in SI units), which implies 6 enc 3.54 10 C. q But we have already accounted for some of that charge in part (a), so
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