利用“半偏法”测电流表内阻,是高中物理电学实验常见的一种方法.关于“半偏”和“大于半偏”的系统误差哪一个更大,长期以来存在着一个错误认识:“大于半偏”比“半偏”系统误差要小,笔者认为这个结论是错误的.下面以一道题目为例,进行分析.例题.为了较准确地测量一只微安表的内阻,采用图1电路进行测量,实验室 The use of “semi-partial method ” measured ammeter resistance, high school physical electrical experiment is a common method .As for “half partial ” and “greater than half partial ” system error which is larger, long-term existence With a wrong understanding: “more than half-off ” system error is smaller than “half partial ” system error is smaller, I think this conclusion is wrong .An example to a subject, for analysis .Example.In order to more accurately measure a Only micro-ammeter internal resistance, using the circuit of Figure 1 for measurement, laboratory