在物理实验中,一般是将直接测定量的误差代入有关误差传递公式中计算出间接测定量的误差。这意味着间接测定量的误差只与这些直接测定量的误差有关。但实际并非如此。例如“线式电位计测电动势”实验,由于只考虑直接测定量的误差,造成了测量结果偏差很大而测量误差又很小的不合理结果。 In physical experiments, it is common to substitute the error of the direct measurement into the error transfer formula to calculate the error of the indirect measurement. This means that the error of the indirect measurement is only related to the error of these direct measurements. But actually it is not. For example, “linear potentiometer electromotive force” experiment, due to consider only the direct measurement of the amount of error, resulting in a large measurement error and measurement error is very small and unreasonable results.