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51问答网 > 高二物理怎么分析电场力，电场强度，电势能的题？

高二物理怎么分析电场力，电场强度，电势能的题？

2025-03-16 00:41:00

推荐回答（3个）

回答1：

电场线的疏密可以判断场强的强弱，再由F=Eq，判断电场力的大小，方向（如果是正电荷，为电场线在该点的切线方向；负电荷，与之相反。）沿着电场线方向，正电荷的电势能减少，负电荷的电势能增加；逆着电场线方向，正好相反。

回答2：

离场源电荷越近，受到的电场力越强
正电荷在电势越高处，电势能越大
负电荷………… 低……，电势能越小

回答3：

记住几个公式就足够了主要是联合电场部分考

E=U\d
qu=电场力的功

F=qU

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