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比较法是确定研究对象之间差异点和共同点的思维过程和方法.各种物理现象和过程都可通过比较来确定其差异点和共同点.交变电流有效值是描述交变电流的一个重要物理量,对交变电流有效值的考查一直是高考中的热点问题.下面谈谈对巧用比较法,求交变电流有效值的思考.一、交变电流有效值与平均值的关系人教版物理选修3-2中有交变电流定义:让交变电流与恒定电流通过相同的电阻,如果它们在一个周期内产生
Comparative law is to determine the study of the differences between the points and common thinking processes and methods.A variety of physical phenomena and processes can be compared to determine the differences and common ground.Acurrent alternating current is to describe the alternating current Important physical quantity, the effective value of the alternating current test has been a hot issue in the entrance examination. Here to talk about the use of comparative method, seeking effective value of alternating current thinking .A, alternating current RMS and the average person There is an alternating current in Physics Physics Elective 3-2 Definition: Let the alternating current and the constant current go through the same resistance if they are generated in one cycle