论文部分内容阅读
《九年义务教育三年制初级中学教科书物理第二册》(人教版)第52页,有这样一段话:“直接把导线连接在电源上,电路中会有很大的电流,可能把电源烧坏,这是不允许的。这种情况叫短路。”教材对短路所下的定义,实际上仅说明了短路的其中一种类型——整体短路(或称为电源短路),并未能概括进短路的另一种类型——局部短路(或称为短接),事实上,恰恰正是由于局部短路问题的存在,才使得电路命题在大纲允许的范围内,更能变化多端、丰富多彩。因此,对局部短路问题进行一下较为系统的
In the “Physical Education Book 2 of Junior High School for 3 Years in Compulsory Education” (page 52), there is a paragraph like this: “Connect the wires directly to the power supply, and there will be a large current in the circuit. This is called “short circuit.” The definition of a short circuit in textbooks actually describes only one type of short circuit—the overall short circuit (or short circuit), not Another type that can be summarized into a short circuit is a partial short circuit (or short circuit). In fact, precisely because of the existence of a local short circuit problem, the circuit proposition is within the scope allowed by the outline, and it can change more. Rich and colorful. Therefore, some systematic short-circuit problems