电容器的电容,是高中物理中一个较重要、比较抽象的概念.现在通过演示电容器的火花放电实验,取得了良好的教学效果.现将实验方法和实验器材介绍如下.1 实验方法用直流高压电源给电容器充电,然后用放电针进行火花放电实验,用改装的演示电表测量电容器两极的电势差,引导学生观察放电火花的强弱.通过改变电容器两极的电势差和更换不同规格的电容器进行对比性实验,定性地验证电量Q与电势差U成正比,它们 Capacitance of capacitors is a more important and more abstract concept in high school physics. Now through demonstration of capacitor spark discharge experiments, we have achieved good teaching results. Now we introduce experimental methods and experimental equipment as follows.1 DC voltage source for experimental methods Charge the capacitor, then use the discharge needle for spark discharge experiment, use the modified demo meter to measure the potential difference between the two poles of the capacitor, and guide the students to observe the intensity of the discharge spark. By changing the potential difference between the two poles of the capacitor and replacing the capacitors of different specifications for comparative experiments, Qualitatively verify that the charge Q is proportional to the potential difference U. They are