谈电路故障部位的诊断

• 作 者: 王兴宪
• 机 构: 山东省莘县采油三厂第九中学 252435
• 出 处: 数理化学习(初中版)
• 发表日期: 2007年11期
• 关键词: 电路故障 示数 诊断方法 电源电压 实验电路 电热壶 物理过程 接触不良 照明电路 串联电路

电路故障诊断题是中考的热点题目,一般分为短路和断路两种,诊断方法应根据题意从短路和断路去分析思考,一种思路是把答案分别代入电路中,根据出现的现象判断哪一种符合题意,即排除法;另一种思路是根据题意直接确定故障部位,从而找到答案.下面举例谈谈这类问题的诊断方法.

Circuit fault diagnosis is a hot topic in the examination, generally divided into two kinds of short circuit and open circuit, the diagnosis method should be based on the idea of ​​short circuit and open circuit to analyze and think, one idea is to put the answers into the circuit, according to the phenomenon of which One kind of consistent problem meaning, that is, elimination method; the other way is to directly determine the fault location according to the meaning of the problem, so as to find the answer. The following example to talk about the diagnosis of this type of problem.