挑战习题
1/5单选题
难度:

1.

如图所示的电路,开关S闭合时,发现L1、L2都不亮,用电压表逐段测量,结果是Uad=6V, Uab=0, Ubc=0,Ucd=6V, 则该电路的故障可能是(  )


A

开关S接触不良

B

灯L1断路

C

灯L2短路

D

灯L2的灯丝断了

提示1:
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提示2:
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提示3:
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正确答案:RA==
PGRpdj7lj5HnjrBMPHN1Yj4xPC9zdWI+44CBTDxzdWI+Mjwvc3ViPumDveS4jeS6ru+8jOivtOaYjueUtei3r+aXtuaWrei3r+eKtuaAge+8m+eUteWOi+ihqOaUvuWcqGJj5Lik56uv77yMYmPkuKTnq6/nlLXljovkuLrpm7bvvIzor7TmmI7mraTml7bnlLXot6/ku43lpITkuo7nn63ot6/nirbmgIHvvJvnlLXljovooajmlL7lnKhjZOerr++8jGNk56uv55S15Y6L562J5LqO55S15rqQ55S15Y6L77yM5q2k5pe255S16Lev5Li66YCa6Lev54q25oCB77yM5Y+v55+lTDxzdWI+Mjwvc3ViPueBr+S4neaWreS6hu+8jOmAiemhuUTmraPnoa48YnI+PC9kaXY+