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电场线这一知识点在《高考说明》中被定为B级.近几年的高考物理对电场线的考查也反映了这一要求.为了有效地帮助同学们运用电场线知识去解决相关问题,本文作如下分析探讨.一、电场线的类型及性质1.电场线按起始状态分有三种:①始于正电荷终止于负电荷;②始于正电荷终止于无穷远处;③始于无穷远处终止于负电荷.
The knowledge of the electric field line is defined as Grade B in the “Examination of College Entrance Examination”. The examination of the electric field line in the college entrance examination physics in recent years also reflects this requirement. In order to effectively help the students to use the electric field line knowledge to solve related problems This article analyzes and discusses as follows. I. Types and properties of electric field lines 1. There are three types of electric field lines according to their initial states: 1 starting from the positive charge ending at the negative charge; 2 starting from the positive charge ending at infinity; 3 Stop at negative charge at infinity.