“电阻的测量”是对闭合电路欧姆定津应用的一个典型实例.它不仅是恒定电流这一章知识的概括和总结,也是对这章知识的进一步深化和理解中师的物理教学要求突出师范性.在内容上删减了测量电阻的其它方法.把用欧姆表测电阻这一方法作为教材的重点 由于教材本身对欧姆表原理阐述得并不系统.而表盘又与学生们见过的其它表盘不同,学习起来模糊难懂.不易掌握,故欧姆表刻度的确定便成为本节的难点 “Measurement of resistance” is a typical example of the application of the closed circuit Ohm Dingjin. It is not only a summary and summary of the knowledge of the constant current, but also a deepening of the knowledge of this chapter and understanding of the physics teaching requirements of the teacher. Sex. The other method of deleting the measurement resistance in the content. The method of measuring the resistance with ohmmeter as the teaching material focuses on the principle of the ohmmeter, the teaching material itself is not systematic, and the dial and the other students have seen The dial is different, learning is vague and difficult to understand. Not easy to grasp, so the determination of the scale of the ohm meter has become the difficulty of this section