论文部分内容阅读
本刊1981年第6期发表了“表头内阻1/2刻度法的误差及其修正公式”一文,作者对所描述的问题作了比较深入的分析,给出了修正公式,读后深有启发。同时也觉得,关于电流表内阻的测量方法这一问题还应该进一步探讨,以找到更合理的测量方法。为此提出后面三种测量方法,愿与读者共同探讨。一、简单测量法测量线路如图1所示。图中,E-电池,其内阻R_i;M-被测电流表,其内阻R_m,满度电流I_m;S_1-开关;R-电阻箱。
The issue No. 6, 1981 6 published “head resistance 1/2 scale error and its correction formula,” a text, the author made a more in-depth analysis of the problems described, given the correction formula, read deep Inspired. At the same time, I also think that the question about the measurement method of ammeter internal resistance should be further explored to find a more reasonable measurement method. To put forward the latter three measurement methods, is willing to discuss with readers. A simple measurement method Measuring line shown in Figure 1. Figure, E-battery, the internal resistance R_i; M-measured ammeter, the internal resistance R_m, full-scale current I_m; S_1-switch; R-resistance box.