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在全日制十年制高中物理下册中,第一个学生实验是“示波器的使用”.这个实验,把教材中有关加速电场、偏转电场这些比较抽象的内容变成了可见的现象,从而降低了教学的难度.经过几年的实践证明,通过学生动手实验,对巩固和加深这部分知识的理解是有好处的.但是,教材中仍有一些有关示波器的内容,如:课本第30页讲的扫描电压为什么必须是均匀增加,而又突然放电变小?示波器上显示的曲线为什么是y端输入的变化的电
In the full-time, ten-year high school physics book, the first student experiment was “the use of oscilloscopes.” In this experiment, the relatively abstract content of accelerated electric fields and deflected electric fields in textbooks became visible phenomena and thus reduced. The difficulty of teaching. After several years of practice has proved that students through hands-on experiments, to consolidate and deepen the understanding of this part of the knowledge is beneficial. However, there are still some oscilloscope content in the textbook, such as: textbook page 30 Why does the scanning voltage have to increase evenly and suddenly the discharge becomes smaller? Why is the curve displayed on the oscilloscope the change of the y-side input?