论文部分内容阅读
在解决交变电流的一些题目中 ,不少同学错误地认为电流的有效值就是平均值 ,交变电流的有效值是根据电流的热效应定义的 ,即如果交变电流通过电阻时产生的热量与某一直流电通过同一电阻在相同时间内产生的热量相等 ,则这一直流电的数值就是该交变电流的有效值。交变电流的平均?
In solving some problems of alternating current, many students mistakenly believe that the effective value of the current is the average value, and the effective value of the alternating current is defined according to the thermal effect of the current, that is, the heat generated when the alternating current passes through the resistance. If a direct current generates the same amount of heat in the same time through the same resistor, the value of this direct current is the effective value of the alternating current. The average alternating current?