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2017年新课标卷Ⅱ的实验试题,跳出了单纯考查学生分组实验的范畴,从通常的考查实验原理、步骤、数据处理、误差分析过渡到利用学过的实验原理和方法去解决拓展变化的实验问题,侧重对考生创新实验能力的考查。下面评析第23题,即电学实验试题。原题某同学利用如图1(a)所示的电路测量一微安表(量程为100μA,内阻大约为2 500Ω)的内
2017 New Curriculum Volume II of the experimental questions, out of a simple examination of the grouping of students in the category, from the usual test of experimental principles, steps, data processing, error analysis to the use of experimental principles and methods learned to solve the expansion of change Experimental problems, focusing on the examinee’s innovative experimental ability. The following analysis of the first 23 questions, that is, electrical experiment questions. The original question of a student using the circuit shown in Figure 1 (a) shows a microammeter table (range 100μA, internal resistance of about 2 500Ω) within