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範例:靜力平衡與靜電庫倫力[95學測]

如圖14所示，在一直線上有兩個點電荷。電量為+4Q的點電荷固定於x = 5a，電量為-Q的點電荷固定於x = 9a。將一點電荷+Q置於直線上何處時，此+Q電荷所受的靜電力為零？(A) 3a (B) 7a (C) 11a (D) 13a (E) 15a。[95學測]

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Posted in 基礎物理(一), 庫侖定律, 歷屆學測(推甄)考題, 電力與磁力.

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By 張慶堂 – 2014 年 05 月 19 日

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