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如何判断电场力做功的正负

更新时间: 2020-07-01 00:00:00     

1、认真读题判断物体所带电荷的正、负;

2、判断电场力的方向即电场线的切线方向是电场力的方向;

3、若为正电荷,则该带电体运动方向与电场力的方向相同时做正功,相反做负功;

4、若为负电荷,则该带电体运动方向与电场力的方向相同时做负功,相反做正功。

关键词: 如何 判断 电场 做功 正负

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