《电子信息专业英语》课件 Lesson 2 Application of Ohm’s Law.pptVIP

Lesson2ApplicationofOhm’sLawKeywords■circuit[‘s?k?t]电路、线路■arrows[?ro]箭头■series[siriz]串联■generator[d??n?,ret?]发电机、发生器■parallel[‘p?r?,l?l]并联■conductors[k?nd?kt?]导体■series-parallel[siriz][p?r?,l?l]串并联的■apparatus[,?p?ret?s]仪器■path[p?θ]通道■voltagedrop[volt?d?][drɑp]电压降■current[‘k??nt]电流■potentialdifference[p?t?n??l][d?f?r?ns]电位差■divides[d?va?d]分流、分开■circuitelement[s?k?t][?l?m?nt]电路元件■points[p??nt]点，节点■terminal[t?m?n!]终点、末端■resistances[r?z?st?ns]电阻■termed称为（=call）■arrangements[?rend?m?nt]装置、设备■no-load空载（无负载）■splits[spl?t]分流、分开■apparent[?p?r?nt]显然的、明显的■branches分支，支路（电路）■internal[?nt?n!]内部的■工作任务：如何调节灯的亮度？■学习目标：掌握最简单的电路的基本原理，理解欧姆定律中元件串联，并联的含义，掌握电路中各个电学参量之间的关系■重点难点：串联、并联电路的电学参量之间的关系■推荐学时：6学时Howtomonitorthebrightnessofalightinacircuit?Whichsegmentdecidesthebrightnessofthelightinthecircuit?Wecanseethebrightnessadjustablelightanywhereinthemarketorinourhome.Rotatetheknob,thelightwillturnbrilliantorturndark.So,whenyourotatetheknob,whathaschangedinthecircuit?■Aseriescircuitisoneinwhichthecurrentflowsinasinglecontinouspathandisofthesamevalueateverypointincircuit(figure1).ResistancebatteryR1ER2Figure1-aFigure1-b■Inaparallelcircuittherearetwoormorecurrentpathsbwtweentwopointsinthecircuit,asshowninfigure2.R1R2AB－＋Figure2■Figure3.showsaseries-parallelcircuit.ABR1R2R2－＋－＋R1R2