ch22-p013 - 13. By symmetry we see the contributions from...

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13. By symmetry we see the contributions from the two charges q 1 = q 2 = + e cancel each other, and we simply use Eq. 22-3 to compute magnitude of the field due to q 3 = +2 e . (a) The magnitude of the net electric field is net 22 2 00 0 19
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