很多物理教研室里都有8Л029型的阴极射线管,该管可以在仪器制造总厂的门市部买到。大多数的情况下只是用在课堂上作演示。但是在学校的可能条件下,用这个射线管还可以作一些有趣的实验。把阴极射线管按图1所描绘的电路联接起来。它的电源是由输出直流电压250—350伏的两极管整流器来供给。可以利用交流 Many physical teaching rooms have 8Л029-type cathode ray tube, the tube can be purchased in the instrument manufacturing plant outlets. In most cases, it is just for demonstration in class. However, with the help of this tube it is possible to make some interesting experiments at school. The cathode ray tube connected by the circuit depicted in Figure 1. Its power supply is supplied by a diode rectifier that outputs a DC voltage of 250-350 volts. Can use communication