在高中物理定律教学中,闭合电路的欧姆定律是一个难点。就这一定律而言,因其内容较为抽象,因而无论是教师的教学还是学生的学习都存在极大的难度。在之前,学生就学过欧姆定律,容易形成“电源没有内阻”“、路端电压不随外电路变化”等思维定势,这更为闭合电路欧姆定律的学习增添了难度。因而,如何进行这一定律的难点教学,就成了广大高中物理教师积极探讨的问题。 In the physics of high school teaching, Ohm’s law of closed circuit is a difficult point. In terms of this law, because of its abstract content, there is great difficulty in teaching both teachers and students. In the past, students learned Ohm’s law, easy to form “power no resistance ” “, road voltage does not change with the external circuit ” and other thinking set, which is more closed circuit Ohm’s law to learn more difficult. Therefore, how to carry out the difficult teaching of this law has become an issue actively discussed by the majority of high school physics teachers.