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1、初二物理一一《欧姆定律的应用》之多种办法测小灯泡电阻（无图填空版・・・Inthispaper,byCat_smallK<7contributionDocdocumentsmayhaveapoorbrowsingexperienceattheWAPend.ItisrecommendedthatyouchooseTXT,ordownloadthesourcefiletothenativeview.Manykindsofwaytomeasureresistance,voltammetrymeasuringresistance1,fixedvalueresistancemcasur
2、cmcntexperimentprinciplc:laboratoryequipment:powersupply,voltmeter,ammeter,thercsistanccundortest,thesliderheostat,switches,wirecircuitdiagram:Experimentalsteps:(1)discormcctswitch,accordingtothecircuitdiagram,connectthephysical,dispatchsliderheostatvaluetomaximize(2)closedswitch,adjustthe
3、positionofthesliderheostatslidingvane,observethevoltmeterandammeterreadings,recordsforUl,Il(3)changethepositionofthesliderheostatslidingvane,observethevoltmeterandammeterreadings,recordforU2,12,(4)repeatsteps3to5times,andthemeasureddataRRl,R2,•…R3,thewillfillintheformof(5)accordingto=U/Ica
4、lculateeachmeasuredrcsistanccaverageofresistance(orusemapliketoprocessthedata)6analysisdata,finishingequipmentLet'simageasanexampletoprocessthedataanalysis:theoriginoftheimageisafixedvalueresistorsofstraightline,itsresistaneevalueisaconstant.Conelusion:thisisafixedvalueresistor,andtheresis
5、tancevalueis...2,smallbulbresistaneemeasurementprinciple,experimentalequipment,powersupply,voltmeter,ammeter,smallbulb,sliderheostat,switches,wirecircuitdiagram:Experimentalsteps:(1)disconnectswitch,accordingtothecircuitdiagram,connectthephysical,dispatchsliderheostatvaluetomaximize(2)clos
6、edswitch,adjustthepositionofthesliderheostatslidingvane,observethevoltmeterandammeterreadings,recordforUl,(3)changethepositionofthesliderheostatslidingvane,observethevoltmeterandammeterreadings,recordforU2,12,(4)repeatsteps3.6times,andwillfillintheformof(5)accordingtothemeasureddataR二U/Ica
7、lculateeachmeasuredresistanceRl,R2,・・・R3andadjustthesliderheostat,makethevoltmeterreadingsnearthesmallbulboftheratedvoltagevalue,andvoltagevalueintervalissmall(every0.1V)values,andrepeatsteps(3)-(5)oneAnalyzedata,organizeequipmentWhensmallbulbvoltagefromtherat
