电磁兼容试卷(英文)b卷教案资料.doc

《电磁兼容试卷(英文)b卷教案资料.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、精品好文档，推荐学习交流南京师范大学2008-2009学年第一学期2006年级《电磁兼容基础》课程期末试卷(B)答案班级：任课教师：学号：姓名：题号一二三四五六七总分得分得分I.QuestionsandAnswers（10x3=30）1、WhatarethetypesofchannelforEMInoisecoupling?Pleasedescribethemsimply.ConductiveEMIRadioactiveEMI得分2、Whatdoeselectromagneticcompatibility(EMC)mean?Thecapabilityofelectricaland

2、electronicsystems,equipment,anddevicestooperateintheirintendedelectromagneticenvironmentwithinadefinedmarginofsafety,andatdesignlevelsorperformance,withoutsufferingorcausingunacceptabledegradationasaresultofelectromagneticinterference.得分3、PleasegivesomemainmethodsforEMInoisesuppression.Balanc

3、ing,Filtering,Isolation,SeparationandorientationCircuitimpedancelevelcontrol,Cabledesign,Cancellationtechniques得分得分仅供学习与交流，如有侵权请联系网站删除谢谢5精品好文档，推荐学习交流I.Fillintheblankswithcorrectanswer（8x6=48）1.Themainreasonsforelectromagneticinterference(EMI)is_____C________A．Noisesource,receiverandcouplingch

4、annelB.SystemandcircuitlayoutC.Powerandfrequencyofsystem2.InEMCregulations,whatcountrydoes“FCCPart15”belongto?__B____A.EuropeanstandardB.USAstandardC.ChinesestandardD.Internationalstandard3.Asseeninfigure1,themainreasonthatdecreasesthenoisevoltageVnonconductor2generatedbyconductor1afterconduc

5、tor2beingshieldedis__B____A.ThecouplingcapacitanceC12betweenconductor1andconductor2isdecreasedB.ThecouplingcapacitanceC1Sbetweenconductor1andtheshieldisdecreasedC.ThecouplingcapacitanceC2Gbetweenconductor2andthegroundisdecreased4.Forsignalgrounding,whenfrequencyislessthan1MHz,usually__A__isad

6、opted.Whenfrequencyislargethan10MHz,usually_B__isadopted.仅供学习与交流，如有侵权请联系网站删除谢谢5精品好文档，推荐学习交流A.Single-pointgroundingB.Multi-pointgroundingC.Hybridgrounding5.Themainnoisesourceingroundingsystemcomesfrom_B____A.Thegroundpotentialdifferenceingroundloopwhenmulti-pointgroundingB.Thenoiseinterference

7、causedbycapacitivecouplingC.Thenoiseinterferencecausedbyinductivecoupling6.Asseeninfigure3forconductiveEMImodel,A.Thecommon-modeinterferencecurrentis__Ib__B.Thedifferential-modeinterferencecurrentis___Ia____C.Thesafetygroundingcurrentis_____I