物理图形是信息的载体,科学地设计与使用物理图形对于直观创设物理情景,使抽象问题具体化、复杂问题简单化所起的作用至关重要,特别是在涉及磁场类的相关问题中,由于许多结论都来自对三维空间中的条件分析,这就更需要我们充分发挥空间想象能力,借助思维的变通性,把物理图形当作 Physical graphics are the carriers of information, and the scientific design and use of physical graphics are crucial for the intuitive creation of physical scenarios, and the role of simplification of abstract problems and simplification of complex issues is of utmost importance, especially in related issues involving magnetic fields. Many conclusions come from the analysis of conditions in a three-dimensional space. This requires us to fully use our spatial imagination ability. With the aid of the flexibility of thinking, we can regard physical graphics as