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电路故障既是中考的重点,又是难点。做电路故障题时该从哪里入手进行判断呢?电路故障主要有短路和断路两种。一般情况下,电路中都有电表。如果电路中既有电流表,又有电压表,解题时应该从电流表人手。如果电流表有示数,说明此电路可能短路;如果电流表没有示数,说明此电路为断路。检查电路中的断路有以下三种方法:1.用电压表检查用电压表跟每段电路并联,当并联到电压表有示数时,说明与电压
Circuit failure is not only the focus of the exam, but also difficult. When making a circuit fault question, where do you start to judge? There are two kinds of circuit faults: short circuit and open circuit. In general, there are meters in the circuit. If there are both ammeter and voltmeter in the circuit, the ammeter should be used to solve the problem. If the ammeter shows a number, indicating that the circuit may be short circuit; if the ammeter does not show the number, indicating that the circuit is open circuit. There are three ways to check the open circuit in the circuit: 1. Use a voltmeter to check the voltmeter and each section of the circuit in parallel. When connecting in parallel to the voltmeter, indicate the voltage.