拜读完贵刊在2014年第4期发表的《干路交变电流有效值与各支路电流有效值之间的关系》后,笔者受益匪浅,但经过笔者的深入研究,原作者的推论都是建立在电路中电阻不变的情况下成立的,而原文作者所举例题却是变化的电阻,所以导致了原文作者的第三个结论是完全错误的。原文例题如下:如图1所示的电路中,理想变 After reading the “Relationship between the effective value of the alternating current of the trunk road and the effective value of the current of each branch” published by your magazine in the 4th period of 2014, the author has benefited a lot, but after in-depth study by the author, the author’s inference It is established under the condition that the resistance in the circuit is not changed, and the original author’s example is the resistance of change, which leads to the third conclusion of the original author is completely wrong. The original example is as follows: In the circuit shown in Figure 1, the ideal change