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电场和磁场是高中物理中两个重要知识,对学生的考察侧重于能力方面的要求。要求学生在理解电、磁场的基本概念基础上,抓住电、磁场对带电粒子作用的本质,运用运动学、动力学、动量、能量等知识综合分析问题;同时两种场的综合应用在科学技术上有很重要的现实意义。近年的高考试题中出经常这类试题。现举例如下:1、速度选择器、质谱仪
Electric and magnetic fields are two important knowledge in high school physics, and the investigation of students focuses on the requirements of competence. Students are required to understand the basic concepts of electricity and magnetic fields, grasp the nature of the effects of electricity and magnetic fields on charged particles, and use kinematics, dynamics, momentum, energy, and other knowledge to comprehensively analyze problems; at the same time, the integrated application of the two fields in science There is a very important practical significance in technology. In recent years, high examination questions often have such questions. Examples are as follows: 1, speed selector, mass spectrometer