分压式与限流式四川省江津中学吴裕泉在近几年的高考中，多次重复考查滑动变阻器的两种连结——分压式与限流式．虽多次重复考查，但仍有考生出错．为什么会出现这一现象？笔者认为原因有二：一是在课本上并没有说明在哪些条件下该用分压式，哪些情况下该用限流式，所以学... Partial Pressure and Current Limiting Wu Yuquan of Jiangjin Middle School in Sichuan Province has repeatedly examined the two links of the sliding rheostat, the partial pressure type and the current limiting type, in the college entrance examination in recent years. Although repeated examinations, there are still candidates who make mistakes. Why does this happen? The author believes that there are two reasons: First, in the textbook did not explain under which conditions the use of partial pressure, which circumstances should be limited to flow type, so learn ...