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为形象地描述场强的分布,在电场中人为地画出一些有方向的曲线,曲线上一点的切线方向表示该点场强的方向,电场线的疏密程度与该处场强大小成正比.电场是一种物质,电场线不是客观存在的一些实线,而是人为地画出的形象描述电场分布的辅助工具,利用它的一些特点可方便地解决一些静
In order to vividly describe the distribution of the field strength, some directional curves are artificially drawn in the electric field. The tangential direction of the point represents the direction of the field strength. The density of the electric field lines is proportional to the field strength The electric field is a kind of matter, the electric field line is not an objective reality, but an artificially drawn image describes the distribution of electric field as a supporting tool, and some of its characteristics can be used to easily solve some static