测量电容量的实验设计

除了用交流电桥法测量电容器的电容量以外,还可以采用另一种测量电容量的实验方法,主要是利用冲击电流计和一个标准电容器,设计一个较简单的实验电路,用比较法把未知电容器的电容量测量出来。这种实验方法操作简单,测量易行,测量结果误差较小。对学生开设这一实验内容,可以使学生更好地掌握电容这一重要概念,并可以进一步深入对冲击电流计的应用研究,扩大知识面。同时,使学生既增强了技能训练的效果,又巩固了基础理论的感性认识。

The Experimental Design for Measuring Capacitance

Apart from the use of alternating current bridge method to measure the capacitance of capacitors, there still can be another method. Firstly, the ballistic current meter with a standard capacitor can be used to design an experimental electrical circuit. The unknown capacity of the capacitor could be measured by using the comparison method. This kind of experiment could be easily operated to get a measurement with relatively fewer errors. From the experiment, students could develop a good understanding of the concept of capacity for the further application study on the ballistic method. To achieve the goal of strengthening the experimental skill, the students could also develop a practical cognition of the fundamental theories.