电流表是初中阶段所学的第一种电表，学好它对以后电表的学习及电学实验都有重要的作用．下面通过几例来重点讨论电流表的量移和读数问题．一、正常情况下的读数例1一只双量程电流表的指针如图正所示，如果使用的两个接线柱是“－”和“3’，则图中所示的电流值为＿安．解观察 The ammeter is the first type of meter learned in junior high school. It is very important to learn about the future of the meter and electrical experiment. Here are a few examples to focus on the problem of measuring and reading the ammeter. 1. Readings under normal conditions Example 1 The pointer of a dual-range ammeter is shown in the figure. If the two terminals used are “-” and “3”, the current value shown in the figure is __. Solution observation