电路故障专项练习题(含答案)

Pushingahead,East,North,Westdevelopment,facilitatingshanty,completexinchengWestRoad,stabilityandreconstructionofthestreet,StarDinggardenbuiltcenturyGardenDistrict,subjectpublichousingconstruction,heatingthegasexpansionacceleratedimplementation,JingRuiRiverandbridgestylelinesolidshaft,furtherexpandedthetowndevelopment.Beautifulcountryadheretotheadvanceandtypicalforagrouptolead.Accordingtoecologicallaybased,andindustryincreasedincome,andliveupgradecivilization,andculturerichconnotationofthought,caughtbuiltbeautifulvillage,andwholevillageadvance,andeasilyrelocation,andfivemodifiedthreebuilt,projectnear30a;depthintoecological,andindustry,andculture,andtourism,elements,highstandardscaughtpartyoriginalcityLiu,andjadeareXiaAO,modelvillage,inprovinceCitysethasbenchmark.Fourisequalbenefitstopromotesharing,coordinateddevelopmentofvarioussocialundertakings.Inthecaseofrigidspendingslowingrevenuegrowth,increase,financial75%tothepeople'slivelihood,themasseshavemoreaccessinthesharing.Cuobansomethinggoodandbenefit.Adheretotheaffordable,best,carefullycuobanvillageoil,waterandheat,cultural,cityandCountycolumnspractical,developmentsbenefitfamilies,bringmorewelfaretothemasses.Developmentofsocialconvenience.Acceptanceofbalanceddevelopmentofcompulsoryeducationthroughthenationalassessment,theCountyvocationaleducationcenterwasnamedtopSchoolofvocationaleducationinChina,thethirdbatchofnationalreformanddevelopmentmodelthroughprovincial...Fiveistodeepenreformandinnovationtobreakbottlenecksandendogenousdevelopmentofeffectivefire.Asanengineofdynamism,addingreformkeytoadoptingreformmeasuresstressenergyandbreakbottlenecksandpromotingdevelopment.Paycloseattentiontothekeyareasofreform.Conscientiouslyimplementtheprovincialdeploymentandcancel,adjustment,toundertaketheadministrativeapprovalitemsaccordingtoRegulation347tofurtherimproveadministrativeefficiencycontinuingdeepeningreformforpovertyalleviation,speedinguprurallandrightregistrationcertificationpilotproject,encouragingtheorderlytransferoflandmanagement,utilizethelandresources,inordertopromotescalemanagementlaidtheFoundation.Activelycultivatethemarket.Firmlyestablishamarket-oriented,nurturingfamilyfarms,industrialusers,professionalcooperationorganizationnewmarketmanagementmainbody456,effectivelyimprovetheindustry,intensiveandmarketizationofencouragingsupportsocialcapitalintothesmallmicro-credit,urbandevelopment,cultureandtourism,publicservicesandotherareas,easingdevelopmentshortfall.Topromotemassinnovation.Tosupporttheruralsectortousenewthinkingandnewideas,creativeworkincentivessuchasactivelypromotingfinancialintermediation,bringadded159innonpublicenterprises,individually-1540,createda中华民族是崇尚英雄、成就英雄、英雄辈出的民族。近代以来，一代代英雄儿女为民族复兴、国家富强奋勇抗争、抛头颅洒热血。没有他们，就没有现在的我们;没有他们，我们就不可能坐在明亮的教室里学习。电路故障分析及考题汇编一、方法介绍1.电路简化这是电路分析中的一个非常重要的步骤，只有把比较复杂的电路简化才能进行电路的分析。对于电路的简化概括为如下几种方法：⑴对于电路中存在的电流表，由于其电阻极小，因此可以用导线将其取代；⑵对于电路中存在的电压表，由于其电阻极大，因此可以看作断路而直接将电压表去掉；⑶对于电路中存在的短路、断路的这部分电路，由于实际没有电流通过，因此也可以直接将该部分电路去掉；⑷对于电路出现的导线端点可以不经电源、用电器、等任意移动；⑸对于电路中出现的滑动变阻器，可以看作是有两个定值电阻组成的电路。经过以上几种电路简化后，电路就会变得比较简单，容易识别出是并联还是串联，明确各用电器的关系，接下去进行第二个步骤是电表的对应。2.电表对应经过电路简化后，电路中基本只出现电源、用电器，电路显得比较简单，把刚才去掉的电表复原上去，。3.电路判断根据题目要求对简化后、电表复原后的电路，结合串并联电路的知识、综合题意进行判断，比如电表的测量分析、电路连接的分析、电路故障的分析、动态电路各电表的示数变化情况等。4.主要电路故障故障1：闭合开关后，灯泡忽明忽暗，两表指针来回摆动原因：电路某处接触不良排除方法：把松动的地方拧紧故障2：闭合开关前灯泡发光闭合开关后灯泡不亮了两表也无示数原因：开关与电源并联导致所有东西都被短路后果：极容易烧坏电源故障3（也就是做题最常见的故障）：闭合开关后灯泡不亮电流表几乎无示数电压表所呈示数几乎为电源电压原因1：灯泡断路故电压表串联到了电路中一般判断电路时都是把电压表当做断路是应为它的电阻很大所以呢如果电压表与一灯泡并联而这个灯泡断路了就相当于直接把这个电压表串联在电路中I=U/R因为电压是恒定的电阻巨大所以电流表的示数就很小了而串联式靠电阻分压的由于电压表的电阻巨大在这么大的电阻前灯泡的电阻就显得微不足道所以电压表显示的几乎是电源电压原因2：电流表与电压表位置互换这样灯泡就被几乎没有电阻的电流表（它接到了电压表的位置上）短路故不亮电路中只串联了一个电流表和一个电压表因为电压表的电阻很大所以几乎分到了全部电压而由于电压表的电阻大所以电流表几乎无示数补充一下：有时做题会问你如果在测小灯泡电阻的实验中（或是电路图中只有一个灯泡两表）如果电流表与电压表位置互换会有什么后果就答：灯泡不亮电流表几乎无示数（其实就是没示数）电压表所示几乎为电源电压（其实就是电源电压）故障4：闭合开关后无论怎样移动滑动变阻器的滑片灯泡亮度与两表示数均无改变原因：变阻器没有按照一上一下的方法来接补充一下：变阻器全接上接线柱时：相当于导线（这是极不安全的容易造成电路电流过大）变阻器全接下接线柱是：相当于一个定值电阻故障5：闭合开关后，无论怎样移动滑片灯泡都不亮原因1：电路某一处断路原因2:灯泡被导线或电流表短路Pushingahead,East,North,Westdevelopment,facilitatingshanty,completexinchengWestRoad,stabilityandreconstructionofthestreet,StarDinggardenbuiltcenturyGardenDistrict,subjectpublichousingconstruction,heatingthegasexpansionacceleratedimplementation,JingRuiRiverandbridgestylelinesolidshaft,furtherexpandedthetowndevelopment.Beautifulcountryadheretotheadvanceandtypicalforagrouptolead.Accordingtoecologicallaybased,andindustryincreasedincome,andliveupgradecivilization,andculturerichconnotationofthought,caughtbuiltbeautifulvillage,andwholevillageadvance,andeasilyrelocation,andfivemodifiedthreebuilt,projectnear30a;depthintoecological,andindustry,andculture,andtourism,elements,highstandardscaughtpartyoriginalcityLiu,andjadeareXiaAO,modelvillage,inprovinceCitysethasbenchmark.Fourisequalbenefitstopromotesharing,coordinateddevelopmentofvarioussocialundertakings.Inthecaseofrigidspendingslowingrevenuegrowth,increase,financial75%tothepeople'slivelihood,themasseshavemoreaccessinthesharing.Cuobansomethinggoodandbenefit.Adheretotheaffordable,best,carefullycuobanvillageoil,waterandheat