在初中物理教学中,电流表和电压表的选择和判断,是学习困难所在.为此,不少教师总结出了各种方法和结论,当我们重新审视这些结论,发现其中存在着缺陷.1现有判断方法文献[1]总结出用“导线法”填表的思路.具体方法如下:方法1,用一根导线代替“○”时,若出现短路时,“○”内填电压表.方法2,用一根导线代替“○”时,若电路仍能完整时,“○”内填电流表.文献[2]的提供的方法有:方法3,若是电压表相当于 In junior high school physics teaching, the selection and judgment of ammeter and voltmeter are the difficulties in learning.Therefore, many teachers summed up the various methods and conclusions.When we re-examine these conclusions, we found that there are flaws in them.1 A judgment method [1] summarizes the idea of ​​using the “wire method” fill in the table as follows: Method 1, with a wire instead of “”, if there is a short circuit, “” Method 2, with a wire instead of “”, if the circuit is still complete, “○ ” to fill the ammeter. [2] provides methods are: Method 3, if Voltmeter equivalent