测量电流表、电压表的内阻是电学实验中经常考查的内容之一,是实验的重点和难点。测量的方法很多:有伏安法、替换法、电桥法和半偏法等等,而半偏法是既简单又常用的方法,下面对这种方法加以分析。 Measuring the internal resistance of ammeters and voltmeters is one of the contents that are often examined in electrical experiments and is the focus and difficulty of experiments. There are many methods of measurement: voltammetry, replacement, bridge method, semi-partial method, etc. Half-side method is a simple and commonly used method. The following method is analyzed.