一、主要内容本章在学习第五章“电流和电路”的基础上 ,首先引导学生学习电压和电阻的概念 ,并进一步通过实验探究电流、电压和电阻的关系 ,得出欧姆定律 ,然后通过实验测量小灯泡的电阻和介绍有关安全用电方面的知识 ,使学生了解欧姆定律在实际生活中的重要应用等 .本章主要? First, the main content In this chapter on the fifth chapter “current and circuit”, based on the first to guide students to learn the concept of voltage and resistance, and further explore the relationship between current, voltage and resistance through experiments to obtain Ohm’s law, and then through the experiment Measure the resistance of the light bulb and introduce knowledge about safe power, so that students understand the important applications of Ohm’s law in real life.