闭合电路的欧姆定律是高中物理恒定电流一章中的重要定律之一,也是高中物理中的教学难点。学生学习的难点主要来自于对电动势的理解和路端电压与电流(外电阻)的关系。形成的原因,从教学内容本身看 Ohm’s law of closed circuits is one of the most important laws in the chapter of high-school physics of constant current and is also a difficult teaching point in high school physics. The difficulty of student learning comes mainly from the understanding of the EMF and the relationship between the voltage and current (external resistance). The formation of the reasons, from the teaching content itself