电场、磁场是电磁学部分的基础。在电场部分,要正确理解电场强度和电势的物理意义;掌握场强的计算方法;理解电场线和等势面的概念及电场线和等势面的关系;理解电场力的功与路径无关,会分析电场力的功与电势能的变化,并能熟练的判断场强方向和各点电势的高低;了解静电平衡条件及处于静电平衡状态下导体的特点;理解电容的物理意义,掌握决定平行板电容器电容的因素,熟练分析平行板电容器的电容、电量、两极电压及场强的变化规律。在磁场部分要重点理解磁感强度的物理意义,掌握各种典型磁场的磁感线分布和磁通量的概念。掌握安培力大小的计算和方向的判定,熟练掌握立体图、侧视图、俯视图的画法。会分析计算安培力矩。理解洛仑 Electric and magnetic fields are the basis of the electromagnetism. In the electric field part, it is necessary to correctly understand the physical meaning of the electric field strength and electric potential; to grasp the calculation method of field strength; to understand the concept of electric field lines and equipotential surfaces and the relationship between electric field lines and equipotential surfaces; to understand the work of electric field force has nothing to do with the path, It will analyze the changes of electric power and electric potential energy, and can judge the direction of field strength and the electric potential of each point skillfully; understand the conditions of electrostatic equilibrium and the characteristics of conductors in electrostatic equilibrium; understand the physical meaning of capacitors and grasp the decision parallel The factors of the capacitance of the plate capacitor are used to analyze the variation of the capacitance, the quantity of electricity, the voltage of the two poles, and the field strength of the parallel plate capacitor. In the magnetic field part, we must focus on understanding the physical meaning of magnetic induction intensity, and grasp the concept of magnetic induction line distribution and magnetic flux of various typical magnetic fields. Grasp the calculation of the size of the Ampere force and the determination of the direction, and master the drawing of the perspective view, side view, and top view. It will analyze and calculate the ampere torque. Understanding Loren