ch23-p028 - 28. As we approach r = 3.5 cm from the inside,...

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28. As we approach r = 3.5 cm from the inside, we have internal 0 2 1000 N/C 4 E r λ πε == . And as we approach r = 3.5 cm from the outside, we have external 00 22 3000 N/C 44 E rr =+= . Considering the difference ( E external
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