1/7多选题
难度：
1.
由于电路中有一处发生故障，导致电压表的示数为零，下列关于电路故障的说法正确的是（ ）
| A | 一定是灯L1短路 |
| B | 可能是灯L1断路 |
| C | 可能是灯L2短路 |
| D | 可能是灯L2断路 |
- 提示1：
- PHA+55S15Y6L6KGo56S65pWw5Li66Zu277yM5Y+v6IO95piv5LiO55S15Y6L6KGo5bm26IGU55qE55S16Lev55+t6Lev5oiW55S15Y6L6KGo5bm26IGU55S16Lev5LmL5aSW55S16Lev5a2Y5Zyo5pat6Lev5oiW55S15Y6L6KGo5pat6Lev77yM5qC55o2u55S16Lev5pWF6Zqc546w6LGh5YiG5p6Q55S16Lev5pWF6Zqc5Y6f5ZugLjwvcD4=
正确答案：QixD
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
2/7单选题
难度：
2.
如图所示，电源电压不变。开关闭合后，灯正常发光。过了一段时间后，灯突然变亮。两个电压表，一个示数变大，一个实数变小。则故障原因是（ ）
| A | R1断路 |
| B | R1短路 |
| C | R2断路 |
| D | R2短路 |
- 提示1：
- PHA+5aaC5p6cUjxzdWI+MTwvc3ViPuaWrei3r+aIluiAhVI8c3ViPjI8L3N1Yj7mlq3ot6/vvIznlLXot6/mlq3lvIDvvIzliJnkuKTnga/pg73nhoTnga3vvIzmiYDku6VBQ+aOkumZpDxicj48L3A+
- 提示2：
- PHA+Jm5ic3A754GvTDxzdWI+Mjwvc3ViPuWPmOS6ru+8jOivtOaYjkw8c3ViPjI8L3N1Yj7kuKTnq6/nlLXljovlj5jlpKfvvIzlm6DmraRWPHN1Yj4yPC9zdWI+56S65pWw5Y+Y5aSn77yMVjxzdWI+MTwvc3ViPuekuuaVsOWPmOWwjzxicj48L3A+
- 提示3：
- PHA+5Y+q5pyJUjxzdWI+MTwvc3ViPuefrei3r++8jFY8c3ViPjE8L3N1Yj7npLrmlbDmiY3og73lj5jlsI88YnI+PC9wPg==
正确答案：Qg==
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
3/7单选题
难度：
3.
如图所示的电路，电源电压保持不变。开关S闭合时，发现只有两个电表的指针发生偏转，电路中的电阻R或灯L有一个出现了故障，则可能（ ）
| A | 电流表A示数为零，电阻R短路 |
| B | 电流表A示数为零，灯L断路 |
| C | 电压表V2示数为零，电阻R短路 |
| D | 电压表V2示数为零，灯L断路 |
- 提示1：
- PHA+5aaC5p6c55S15rWB6KGo56S65pWw5Li66Zu277yM5YiZ55S16Lev5Lit5Ye6546w5pat6Lev5pWF6Zqc44CC54GvTOaWrei3r+eUteWOi+ihqFY8c3ViPjI8L3N1Yj7msqHnpLrmlbDvvIzkuI3nrKblkIjpopjmhI/jgII8YnI+PC9wPg==
- 提示2：
- PHAgc3R5bGU9Im1hcmdpbi1sZWZ0OjEwLjVwdDsiPueUteWOi+ihqFY8c3ViPjI8L3N1Yj7npLrmlbDkuLrpm7bvvIznlLXmtYHooajlkoznlLXljovooahWPHN1Yj4xPC9zdWI+5pyJ56S65pWw77yM5Y+q5pyJUuefrei3r+aJjeespuWQiOimgeaxguOAguWmguaenEzmlq3ot6/vvIzliJnnlLXmtYHooajnpLrmlbDkuZ/kuLrpm7Y8YnI+PC9wPg==
正确答案：Qw==
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
4/7单选题
难度：
4.如图所示，当开关闭合后两灯均不亮，电流表无示数，电压表示数等于电源电压，则电路发生的故障是（ ）
| A | 电源接线接触不良 |
| B | 电流表损坏，断路，其他元件完好 |
| C | 灯L1发生灯丝烧断 |
| D | 灯L2发生短路，其他元件完好 |
- 提示1：
- IOS4pOWPqueBr+azoeS4suiBlO+8jOeUtea1geihqOa1i+mHj+eUtei3r+eUtea1ge+8jOeUteWOi+ihqOa1i+mHj+eBr+azoUw8c3ViPjE8L3N1Yj7kuKTnq6/nlLXljos=
- 提示2：
- IOmXreWQiOW8gOWFs+eUtea1geihqOayoeacieekuuaVsO+8jOivtOaYjueUtei3r+aYr+aWrei3r++8jOeUteWOi+ihqOacieekuuaVsO+8jOivtOaYjuS4jueUteWOi+ihqOS4suiBlOeahOeUtei3r+aYr+mAmui3rw==
- 提示3：
- IOeBr0w8c3ViPjE8L3N1Yj7lj5HnlJ/nga/kuJ3ng6fmlq0=
正确答案：Qw==
PGRpdj7kuKTlj6rnga/ms6HkuLLogZTvvIznlLXmtYHooajmtYvph4/nlLXot6/nlLXmtYHvvIznlLXljovooajmtYvph4/nga/ms6FMPHN1Yj4xPC9zdWI+5Lik56uv55S15Y6LLOmXreWQiOW8gOWFs+eUtea1geihqOayoeacieekuuaVsO+8jOivtOaYjueUtei3r+aYr+aWrei3r++8jOeUteWOi+ihqOacieekuuaVsO+8jOivtOaYjuS4jueUteWOi+ihqOS4suiBlOeahOeUtei3r+aYr+mAmui3ryznga9MPHN1Yj4xPC9zdWI+5Y+R55Sf54Gv5Lid54On5patLjwvZGl2Pg==
5/7单选题
难度：
5.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：
- IOeUteWOi+ihqOacieekuuaVsO+8jOivtOaYjueUteWOi+ihqOS4jueUtea6kOebuOi/nueahOmDqOWIhuaYr+mAmui3rw==
- 提示2：
- IOeUteWOi+ihqOaXoOekuuaVsO+8jOivtOaYjueUteWOi+ihqOS4jueUtea6kOebuOi/nueahOmDqOWIhuS4jemAmg==
- 提示3：
- IGNk6Ze05pat6Lev
正确答案：RA==
PGRpdj7nlLXljovooajmnInnpLrmlbDvvIzor7TmmI7nlLXljovooajkuI7nlLXmupDnm7jov57nmoTpg6jliIbmmK/pgJrot68s55S15Y6L6KGo5peg56S65pWw77yM6K+05piO55S15Y6L6KGo5LiO55S15rqQ55u46L+e55qE6YOo5YiG5LiN6YCaLOaJgOS7peWPquiDveaYryBjZOmXtOaWrei3rzwvZGl2Pg==
6/7单选题
难度：
6.
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Uab=0,Ubc=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：
- PHA+5Lik5Liq54Gv6YO95LiN5Lqu77yM6YKj5LmI55S16Lev5pat6Lev77yI5Zug5Li65aaC5p6c5Lik5Liq54Gv6YO955+t6Lev77yM55S15rqQ5bCG6KKr54On5q+B77yM6L+Z5piv5LiN5YWB6K6455qE77yJPC9wPg==
- 提示2：
- PHA+55S16Lev5pat6Lev77yM55S15Y6L6KGo5peg56S65pWw77yMIOivtOaYjueUteWOi+ihqOS4jueUtea6kOaYr+aWreW8gOeahDwvcD4=
- 提示3：
- PHA+55S15Y6L6KGo5pyJ56S65pWw77yM5oGw5oGw6K+05piO5ZKM55S15Y6L6KGo5bm26IGU6YOo5YiG5pat6Lev77yI5Zug5Li66L+Z5pe255S15Y6L6KGo5Y+v5Lul5ZKM55S15rqQ5o6l6YCa77yM55u45b2T5LqO5rWL55S15rqQ55S15Y6L77yJPC9wPg==
正确答案：RA==
PGRpdj4mbmJzcDvkuKTkuKrnga/pg73kuI3kuq7vvIzpgqPkuYjnlLXot6/mlq3ot6/vvIjlm6DkuLrlpoLmnpzkuKTkuKrnga/pg73nn63ot6/vvIznlLXmupDlsIbooqvng6fmr4HvvIzov5nmmK/kuI3lhYHorrjnmoTvvIk8L2Rpdj48ZGl2PueUtei3r+aWrei3r++8jOeUteWOi+ihqOaXoOekuuaVsO+8jCDor7TmmI7nlLXljovooajkuI7nlLXmupDmmK/mlq3lvIDnmoQ8L2Rpdj48ZGl2PueUteWOi+ihqOacieekuuaVsO+8jOaBsOaBsOivtOaYjuWSjOeUteWOi+ihqOW5tuiBlOmDqOWIhuaWrei3r++8iOWboOS4uui/meaXtueUteWOi+ihqOWPr+S7peWSjOeUtea6kOaOpemAmu+8jOebuOW9k+S6jua1i+eUtea6kOeUteWOi++8iTwvZGl2PjxkaXY+5omA5Lul562U5qGI5Li6RDwvZGl2Pg==
7/7单选题
难度：
7.
如图所示，闭合开关，两个灯都不亮，电流表指针几乎不动，而电压表指针有明显偏转，该电路故障可能是（ ）
| A | 电流表坏了或未接好 |
| B | 从a点经过电流表、电源、灯泡L1到b点的电路中有断路 |
| C | L1灯丝烧断或灯座未接通 |
| D | 电流表和L1、L2都坏了 |
- 提示1：
- PHA+55S15Y6L6KGo5oyH6ZKI5pyJ5piO5pi+5YGP6L2sLOivtOaYjueUteWOi+ihqOi/nuWFpeeUtei3r+eahOi/meS4gOauteaYr+mAmui3r+eKtuaAgTwvcD4=
正确答案：Qw==
PGRpdj7nlLXljovooajmjIfpkojmnInmmI7mmL7lgY/ovaws6K+05piO55S15Y6L6KGo6L+e5YWl55S16Lev55qE6L+Z5LiA5q615piv6YCa6Lev54q25oCB77yM5YiZ6Zeu6aKY5LiA5a6a5piv5Zug5Li6TDxzdWI+MTwvc3ViPu+8jOmAiemhuUPmraPnoa48L2Rpdj4=