中学物理介绍了麦克斯韦电磁场理论的两个要点 :(1 )变化的磁场产生电场 ;(2 )变化的电场产生磁场 .这个内容比较抽象 ,教材中没有作进一步深入地讲解 ,所以学生对此只有一点肤浅的理解 .然而 ,这里提出了一种新的电场——感应电场 .笔者认为对感应电场的认识有必要适当加深 , Middle school physics introduced two main points of Maxwell’s electromagnetic field theory: (1) a changing magnetic field generates an electric field; (2) a changing electric field produces a magnetic field. This content is relatively abstract and is not further explained in the textbooks, so students have only a little Superficial understanding. However, here is a new electric field—induction electric field. The author thinks that it is necessary to deepen the understanding of the induced electric field.