在平时的教学过程中发现,学生对于打点计时器纸带处理的问题,还是很不熟悉,每次考试都有相关的问题.可是逢考必错,像这样考试中的必考题,怎样才能提高学生的正确率呢?笔者进行了一番思考.一、打点计时器的种类目前我们有两种打点计时器,一是电磁打点计时器,还有一种是电火花打点计时器.电磁打点计时器是老式的计时器,要用学生低压交流电源,课本是说是6 V以下,但笔者在平时的实验中发现,6~8 V时振针才能打出较为清晰的点迹,而电压 In the usual teaching process, students are still not familiar with the problem of handling paper tapes with timers, and each examination has related problems. However, every exam must be wrong. How can we improve such exam questions as the exams? The correct rate of students? I made a lot of thinking First, the type of RBI timer Currently we have two RBI timers, one electromagnetic RBI timer, there is a EDM RBI timer. Is an old-fashioned timer, to use students low-voltage AC power supply, the textbook is said to be 6 V below, but I found in the usual experiments, 6 ~ 8 V when the vibrating pin can play a more clear trace, and voltage