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人教版新教材物理选修3-1第68面第一题,当选用100mA量程时,教参答案为22.8mA,这个答案有很大疏忽,给命题带来误导。根据实验误差理论,有效数字最后一位一定要同误差出现位对齐。由于中学教材没有介绍电表准确度等级规则,教学中可以由电表的最小分度值确定误差出现位,最后的结果就与误差出现位对齐。
PEP New Materials Physics Elective 3-1 68th surface of the first question, elected to use 100mA range, teaching reference answer is 22.8mA, this answer is a great oversight, misleading the proposition. According to experimental error theory, the last significant digit must be aligned with the error bit. Because high school teaching materials do not introduce the rules of meter accuracy grade, the teaching can be determined by the smallest graduation meter error bit, the final result aligned with the error bit.