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1、拆分习题突破难点（Splitexercises,breakthroughdifficulties）Splitexercises,breakthroughdifficulties[analysisofteachingmaterials]ElectricpoweristhekeyanddifficultpointofPhysicsTeachinginjuniorhighschool,anditisalsothekeypointofmiddleschoolentranceexamination.Inparticular,theproblemofcalculatin
2、gthedynamiccircuitofslidingrheostatisthemostfrequentlyoccurredintheexamquestionsandthemostfrequentlydetectedones.Suchtopicscontainmoretext,moredata,andsomeoftheminterferewithdata.Inviewofthissituation,Iwillbeacomplexproblemissplitintofoursmallquestionsfromeasytodifficult,everyprobl
3、emlookssimilartothepreviousquestion,butlittledifference.Leadthestudentsstepbystepfromtheshallowtothenaturaltransitiontothedifficultyofthemockexam.Thisshow,reducethedifficultyofstudentlearning,inlinewiththecognitivedevelopmentofthestudents,thestudentstoeliminatethefearofemotions,sti
4、mulatethestudentsdaretochallengethephysicalproblemofdesireandenthusiasm.Inaword,studentscandosuchexercisesbytrainingintheexercisessectionofthissection.Sothatthethirdgradestudentsinbusylearningcangetridofthe"seatactics"toachievethegoaloftwicetheresultwithhalftheeffort.[learningsitua
5、tionanalysis]AlthoughthestudentshavebeenlearningtheOhm'slaw,seriesparallelcircuitcharacteristics,electricpower,electricpowerandotherrelevantknowledge,butmanystudentsencountersomesimpleexercisestodo,encounteradifficultexercisealwaysfeelunabletostart,somoststudentswillchoosetogiveup.
6、Inviewofthissituation,Ichoosethedynamiccircuitsimulationprobleminseniorhighschoolentranceexaminationmostfrequentlyandisverydifficultforatypeofexercise,aslidingrheostatanalysisproblem.[teachingobjectives]Knowledgeobjectives:accountingfordynamiccircuitsofslidingrheostat.Abilitygoal:t
7、otrainstudents'analyticalabilityandflexibilityinusingbasicknowledgetosolveelectricalcalculationproblems.Emotion,attitudeandvalue:stimulatestudents'interestinphysicsbystudyinginthislesson.[emphasisonteaching][teachingdifficulties]Dynamicanalysisofslidingrheostatinseriescircuit[intro
8、duction]doyouknowthiscircu
