论文部分内容阅读
现行高中物理教材(必修本)中介绍了伏安表测电阻的方法,原理、电路都很简单,易于学生掌握,确实是一种好方法。但也存在着一个缺点,即无论用内接电路还是用外接电路都存在着不可避免的系统误差,这个误差是电路本身不能解决的。笔者通过试验发现了一种更好的测量方法,现介绍如下。
The current high school physics textbook (required) introduces the method of measuring volt-ampere resistance. The principles and circuits are very simple and easy for students to master. It is indeed a good method. However, there is also a shortcoming that there is an inevitable system error whether the internal circuit or the external circuit is used. This error cannot be solved by the circuit itself. The author found a better measurement method through the experiment, which is introduced as follows.