单选题-单题 较易0.85 引用2 组卷289
如图所示的电路中,a、b两端接入
电压时,发现灯L1和L2都不亮,用电压表检查电路各段电压,测得
,若电路中只有一处出现故障,则应是( )
![](https://img.xkw.com/dksih/QBM/2021/12/10/2869370342236160/2870195921518592/STEM/ea5b7a56-41ef-4da8-8bdd-10f740f6a2b2.png?resizew=161)
![](https://img.xkw.com/dksih/QBM/2021/12/10/2869370342236160/2870195921518592/STEM/ea5b7a56-41ef-4da8-8bdd-10f740f6a2b2.png?resizew=161)
A.灯L1断路 | B.灯L1短路 | C.灯L2断路 | D.灯L2短路 |
21-22高二上·福建南平·期中
类题推荐
如图所示电路中灯泡L1和L2都不亮,用电压表测得各部分的电压分别为:Uad=U,Uab=0,Ubc=U,Ucd=0,已知a、d间电源电压为U,则产生的故障原因可能是:(只有一处断路)( )
![](https://img.xkw.com/dksih/QBM/2017/11/5/1810664866545664/1812152323137536/STEM/2af710fd-4a88-4eff-a4e6-32d3814cd7ec.png?resizew=231)
![](https://img.xkw.com/dksih/QBM/2017/11/5/1810664866545664/1812152323137536/STEM/2af710fd-4a88-4eff-a4e6-32d3814cd7ec.png?resizew=231)
A.灯泡L1断路 |
B.灯泡L2断路 |
C.变阻器断路 |
D.电源断路 |
如图所示,电路中灯泡L1和L2都不亮,先用电压表分别测得各部分电压为:Uab=0,Ubc=U,Udc=0,Uda=U。则电路的故障为( )
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510756854071296/2536619573698560/STEM/94ec5dbb-69dd-4a30-8b3a-6f40204f4080.png?resizew=244)
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510756854071296/2536619573698560/STEM/94ec5dbb-69dd-4a30-8b3a-6f40204f4080.png?resizew=244)
A.变阻器R短路 | B.变阻器R断路 |
C.灯泡L1断路 | D.灯泡L1和L2都断路 |
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