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高考分值:15分考点指要电场一章较难掌握,主要有以下几方面原因:1.电场是看不见、摸不着的一种特殊物质,不直观。2.电场一章涉及概念较多,如:电场强度、电场线、电势、电势差、等势面、匀强电场、电容等,且概念比较抽象。3.由于存在正负电荷的差异,使得电场力和电势能的变化情形复杂。电场一章内容的核心是电场及其性质。电荷守恒定律和库仑定律是电场的基础。电场中的导体、电容器可看作电场性质的应用。带电粒子在电场中的运动是电场性质与力学规律的综合应
College entrance examination scores: 15 points test points to the electric field is more difficult to grasp a chapter, mainly in the following areas: 1. The electric field is invisible, touching a special material, not intuitive. 2. Electricity chapter involves more concepts, such as: electric field strength, electric field lines, potential, potential difference, equipotential surface, uniform strong electric field, capacitance, etc., and the concept of more abstract. 3. Due to the difference between positive and negative charges, the change of electric field force and potential energy is complicated. The essence of the electric field chapter is the electric field and its nature. The law of conservation of charge and Coulomb’s law are the basis of the electric field. Electric field conductors, capacitors can be seen as the nature of the electric field applications. The movement of charged particles in an electric field is a comprehensive response to the nature of the electric field and the laws of mechanics