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虽然高中物理新课标考试大纲中对示波管的要求级别不高,但由于其工作原理涉及带电粒子在匀强电场中偏转的综合应用,而且其原理还可以用于分析打印机字体放大、电视图像放大等日常工作实例,所以在全国各地的高考试题中,每年都会有从不同的角度考查示波管工作原理的试题。由于示波管工作原理比较复杂,这就给学生解决问题带来了很大困难。下边笔者分三步解决这一教学和考试难点。
Although the requirements of high school physics new curriculum syllabus test tube is not high, but because of its working principle involves the integrated application of charged particles in uniform electric field deflection, and its principle can also be used to analyze the printer font amplification, television Image enlargement and other daily work examples, so in all parts of the entrance examination questions throughout the country every year from a different point of view of the working principle of the test tube questions. Due to the complexity of the working principle of the oscilloscope, this gives students a great deal of difficulty in solving the problem. Below the author in three steps to solve this teaching and exam difficulties.