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“测定金属的电阻率”是电学实验中一个很重要的实验,也是一个综合性很强的实验.既考查了实验的基本技能,如长度测量中最常用的两种工具游标卡尺和螺旋测微器的使用与读数、测量仪器(电流表、电压表)的读数规则;又考查了实验能力,如电路的设计,仪器的选择、误差的分析等.笔者在高考复习备考讲解电学实验时,发现把这一实验讲透了,学生理解了,后面的电学实验就容易多了,
“Determination of metal resistivity” is a very important experiment in electrical experiments, but also a very comprehensive experiment, both to examine the basic skills of the experiment, such as the two most commonly used tools for length measurement vernier caliper and spiral test The use of micro-devices and readings, measuring instruments (ammeter, voltmeter) reading rules; also examined the experimental capabilities, such as the design of the circuit, the choice of instruments, error analysis, etc. The author reviewing the entrance examination to explain the electrical experiment, found Speaking of this experiment, students understand that the electrical experiment behind the much easier,