P23_006 - 6. For concreteness, consider that charge 2 lies...

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6. For concreteness, consider that charge 2 lies 0 . 15 m east of charge 1, and the point at which we are asked to evaluate their net ±eld is r =0 . 075 m east of charge 1 and r . 075 m west of charge 2. The values of charge are q 1 = q 2 =2 . 0 × 10 7 C. The magnitudes and directions of the individual ±elds are speci±ed: ¯ ¯ ¯ ~ E 1 ¯ ¯ ¯ = q 1 4 πε 0 r 2 =3 . 2 × 10 5 N / Ca n d ~ E 1 points east
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