在初三物理电学部分内容的教学中,学生对于电流表、电压表在电路的示数变化情况以及如何列方程(组)求解电路中有关物理参量在掌握串、并联电路的性质、欧姆定律、电功、电功率、焦耳定律的知识的前提下仍然很难有把握正确地进行解题,需要教师指导解题方法和步骤,对学生形成良好的思维习惯,运用基 In the teaching of the third part of the physical electricity in the third grade, the students learn about the variation of the ammeter and voltmeter in the circuit and how to list the equations (group) to solve the circuit. The physical parameters in the circuit grasp the properties of the string and parallel circuit, Ohm’s law, and electricity. Under the premise of knowledge of power, electric power, and Joule’s law, it is still difficult to grasp the problem correctly and correctly. It requires teacher guidance to solve problem-solving methods and steps, to form a good thinking habit for students, and to use