Commonly used has the galvanometer, the amperemeter, a volt idea, the electric bridge, the potential difference counts and so on.

常用的有电流表，电流表，电压的概念，电桥，电位差计数等。

We analyze the error reasons of inferring inside block of amperemeter in the middle divisor as well as bring forward betterment measure.

本文分析了用半偏法测电流计内阻时误差产生的可能原因，并提出改进措施。

We analyze the error reasons of inferring inside block of amperemeter in the middle divisor, as well as bring forward betterment measure.

本文分析了用半偏法测电流计内阻时误差产生的可能原因，并提出改进措施。

For ammeter A1, milliamperemeter or digital ammeter shall be used while for ammeter A2 amperemeter upto 50 A or digital ammeter shall be used.

电流表A1应选用量程为毫安级电流表或选用数字电流表； 电流表A2应选用量程为50 A以下的安培级电流表或选用数字电流表。

Amperemeter inner resistance measure experiment method in teaching material analyses the system error and experiment method can be ameliorated.

对教材中电流表内阻测量实验方法分析其系统误差，从而对实验方法进行改进。