等势面为何与电场线垂直?
人气：272 ℃ 时间：2020-02-06 11:16:17
解答
沿等势面移动电荷电场力不做功,而不做功的力必定垂直于运动方向,电场力与电场方向同直线,因此电场线垂直于等势面.
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