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1 课前准备 本节课可将教师的演示实验改为学生实验,采取实验探索的方法进行科学猜想的教学,教师应准备好学生观察和实验的器材,使用的电容器有:废旧日光灯启辉器上的小电容器、陶瓷介质半可变电容器、空气介质可变电容器、云母介质可变电容器;其他实验器材有:实验用平行板电容器几套、静电计、玻璃棒、丝绸、导线等,由于要做的是静电实验,为了保证实验成功,教师应先对平行板电容器、静电计、玻璃棒、丝绸等器材进行清洗,特别对平行板电容器和静电计的绝缘部位要确保清洁。清洗完毕后,要将这些器材放进烘箱,进行烘干或用红外线灯光照射处理。
1 Pre-class preparation This lesson can change the teacher’s demonstration experiment into a student experiment, adopt an experimental exploration method to conduct scientific guessing teaching, and teachers should prepare students’ observation and experimentation equipment. The used capacitors are: waste fluorescent lamp starter On the small capacitors, ceramic media semi-variable capacitors, air dielectric variable capacitors, mica dielectric variable capacitors; other experimental equipment: experimental parallel plate capacitors several sets, electrometer, glass rod, silk, wire, etc., due to The electrostatic experiment is done. In order to ensure the success of the experiment, teachers should first clean the parallel plate capacitors, electrometers, glass rods, silk and other equipment, especially the insulating parts of the parallel plate capacitors and electrometers. After cleaning, these devices should be placed in an oven, dried, or irradiated with infrared light.