062电场中的图像 精讲精练-2022届高三物理一轮复习疑难突破微专题
062电场中的图像 一.必备知识1.几种典型电场线分布示意图及场强电势特点表(下面均以无穷远处为零电势点)孤立的正点电荷电场线直线,起于正电荷,终止于无穷远。E离场源电荷越远,场强越小;与场源电荷等距的各点组成的球面上场强大小相等,方向不同。φ离场源电荷越远,电势越低;与场源电荷等距的各点组成的球面是等势面,每点的电势为正。等势面以场源电荷为球心的一簇簇不等间距的球面,离场源电荷越近,等势面越密。孤立的负点电荷电场线直线,起于无穷远,终止于负电荷。E离场源电荷越远,场强越小;与场源电荷等距的各点组成的球面上场强大小相等,方向不同。φ离场源电荷越远,电势越高;与场源电荷等距的各点组成的球面是等势...
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