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电路故障分析既能考查学生对有关电路串并联规律和电流表、电压表特点等知识,也能考查学生解决实验中可能遇到实际问题的能力,因而是考试中必不可少的题型.电路故障常见的情况是断路和短路,检验的方法有小灯泡法、电压表法、电流表法、导线法.下面以电路中存在一处故障为例来说明电路故障的判断方法.一、断路的判断1.电路断路的主要表现电路某部分发生断路的最显著特征是与该部分串联的电路中无电流(电流表无读数)、用电器不工作(灯不亮).如果发现这种情况,则电路的故障是发生了断路.
Circuit fault analysis can not only examine the students on the circuit series and parallel law and ammeter, voltmeter characteristics such as knowledge, but also examine the students to solve the experiment may encounter practical problems in the ability and therefore is an essential test questions. The common situation is open circuit and short circuit, the test method is a small bulb method, voltmeter method, ammeter method, wire method. The following circuit to the existence of a fault as an example to illustrate the circuit fault judgment method. Main features of circuit breaking The most notable feature of a circuit breaking in a part of a circuit is that there is no current in the circuit in series with this part (the ammeter has no readings) and the appliance does not work (the lamp is off). If this is the case, The fault is an open circuit.