用箱式电势差计校正电表实验的改进

Improvement on Experiments of Revising Ammeters with Box Electricity Potential Difference Meter

原有箱式电势差计校正电表实验线路往往只能校正电表而不能同时测量电表的内阻,通过对电路加以改进可以克服这些缺点。

The former circuit in experiments of revising ammeters with box electricity potential difference meters can only revise an ammeter, but can not measure the interior resistance of the ammeter at the same time, which can be overcome with the improvements on the circuit.