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一、“试触”问题的出现要求及目的在人教版第二册物理课本第67页关于电流表的使用第3点和第78页关于电压表的使用“想想议议”中分别提出了有关电流表和电压表的“试触”问题,同时“试触”作为一种基本实验技能也是新大纲中明确提出“会用电流表测电流”“会用电压表测电压”要求的具体化.对于“试触”的目的,笔者认为就是为了选用合适量程:一方面避免盲目选用小量程而使电表
The requirements and purpose of the first, “test touch” problem in the second edition of Physics Education Textbook page 67 on the use of ammeter 3 and 78 on the use of voltmeter“think about resolution” The “test contact” questions relating to ammeters and voltmeters are presented separately. At the same time, “touch test” as a basic experimental skill is also clearly stated in the new syllabus. “Use current meters to measure currents” will be used. Voltmeter voltage test “requirements of the specific. For ”test touch" purpose, I think is to select the appropriate range: on the one hand to avoid blindly choose a small range and make the meter