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电场是高中物理知识的重要部分,要学好这部分知识,必须理解和掌握电场中的三线和两性问题。电场中的三线指的是带电粒子的运动轨迹、电场线和等势线。两性是指电场力的性质和能的性质。高考中常以带电粒子在电场中的运动为情景,借助三线考查电场的两性。求解这类考题的一般思路是:首先对带电粒子运动轨迹的特点进行分析,推断出带电粒子的带电性质,再分析带电粒子的受力情况,最后分析带电粒子的电势能和动能的变化情况。在
The electric field is an important part of high school physics knowledge. To learn this part of knowledge, we must understand and master the third-line and gender issues in the electric field. The three lines in the electric field refer to the trajectories of the charged particles, the electric field lines and the equipotential lines. Gender refers to the nature and energy nature of electric field forces. College entrance examination often charged particles in the electric field in the movement of the scene, with the help of three lines to test the electric field of both sexes. The general idea of solving these questions is as follows: Firstly, the characteristics of the trajectory of charged particles are analyzed, the charged properties of charged particles are deduced, the force of charged particles is analyzed, and the changes of potential and kinetic energy of charged particles are analyzed. in