Report - 일반물리2 Introductionoptics.hanyang.ac.kr/~shsong/21-Charges.pdf · 2016-08-31 · 2 = 1 2 r 2 21 1 2 12 rˆ r q q F =k e r 2 12 1 2 21 rˆ r q q F =k e r rˆ 21 =−rˆ 12 F

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