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电流表和电压表是高中电学实验中的两种重要电表.高考也要求学生会使用、会读数.笔者在教学中发现,学生对这两种电表的读数问题较为模糊,容易读错.为了能快、准地读数,例谈这两种电表的读数规则.1.“十分法”最小分度为“1”的电表,误差出现在最小刻度下一位,读数时要估读到最小刻度下一位,下一位按1/10估读.例如,量程为3 A的电流表和量程为3 V的电压表,其最
Ammeter and voltmeter are two important high school electricity experiment meter. The college entrance examination also requires students to use, will read the author found in teaching, the students of these two meter reading problem is more vague, easy to read wrong.In order to be able to quickly, Quasi-reading, for example, the reading of these two meter rules .1. “Very Law ” The smallest sub-degree “1 ” meter, the error appears in the next smallest scale, reading to be read to a minimum The next digit on the scale is estimated at 1/10, for example, a current meter with a range of 3 A and a voltmeter with a range of 3 V,