“磁场”是初中物理中较其它概念难以理解和掌握的内容,它又是今后学习物理必不可少的重点知识。笔者根据教学中的体会,就演示实验的设计、基本概念的讲法和学生中容易出现的错误,谈几点粗浅的看法。一、“磁场”概念的引入首先引导学生复习力的概念和简单的磁现象,使学生理解磁铁对放在它周围的小磁针的作用就是一种力——磁力。对于课本上图10-8的实验应精心设计,宜选用磁性较强的条形 “Magnetic field” is difficult to understand and grasp in junior high school physics than other concepts. It is also an indispensable key to learning physics in the future. According to the experience in teaching, the author discusses some superficial views on the design of the demonstration experiment, the basic concept of teaching, and the prone to errors among students. First, the introduction of the concept of “magnetic field” guides the concept of student review and a simple magnetic phenomenon, so that students understand that the role of a magnet on a small magnetic needle placed around it is a kind of force—magnetic force. The experiment in Figure 10-8 should be carefully designed and the magnetic stripe should be used.