《磁场》是人教版义务教育课程标准实验教科书八年级下册第九章《电与磁》的第二节内容。对于磁现象,学生在小学科学课中已经有了初步地了解,且他们的感性体验也较丰富,学习起来不是十分困难。但磁场的存在、用磁感线描述磁场是全新的内容,初中生又是首次接触“场”这个概念,因此学习的难度较大。磁场是电磁学里的一个基本概念,而“磁场”是看 “Magnetic field” is the second part of the ninth chapter “electricity and magnetism” of the eighth edition of the eighth edition of the standard textbook compulsory education curriculum standard textbook. For magnetic phenomena, students already have a basic understanding of primary science and they are also more experienced and experienced in learning, not difficult to learn. However, the existence of a magnetic field, magnetic field describes the magnetic field is a new content, junior high school students is the first contact with the “field” concept, so difficult to learn. Magnetic field is a basic concept in electromagnetism, and “magnetic field” is to see