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1、初中物理总复习欧姆定律（GeneralphysicsinjuniorhighschoolreviewOhm'slaw）GeneralreviewofphysicsinjuniorhighschoolOhm'slaw[thinkingandtraining]Thevoltageacrossaresistor1.is6volts,throughwhichthecurrentis1A,theresistanceis_____Europe;ifchangedto9voltsinvoltageacrossit,itsresistanceis____inEurope,thecurrentthrough
2、itis_____;iftheconductorendswithoutvoltagethen,thecurrentthroughitis_____,itsresistanceis____europe.2.tworesistanceratioR1:R2=3:2seriesaccesscircuit,throughwhichthecurrentratioofI1:I2=_____,andthevoltageacrossthemthanU1:U2=_______,iftheyareconnectedinparallelcircuit,throughwhichthecurrentratioofI1
3、:I2=_____.3.therearetworesistancewires,R1=2Europe,R2=6inEurope,theyareconnectedinserieswiththe12voltpowersupply,thetotalresistanceis_____,thetotalcurrentinthecircuitis______,R1voltageatbothendsofthevoltageatbothendsofthe_____,R2______.Asshowninfigure4.,thepowersupplyvoltageof6voltstokeepunchangedw
4、henS1isclosed,theS2isopened,thetableshowsthenumberofAis0.26V1,thetableshowsthenumberof2.8volts,currentflowfromthepowersupplyfor_______,thentheV2tableshowingthenumberof_____v.WhenS1andS2areclosed,thetableshowsthenumberofV1is_____V,V2tableshowingthenumberof_____v.Asshowninfigure5.circuit,powersupply
5、consistsofthreebatteriesinseries,whentheSisclosed,thetableshowsthenumberofVis2.5volts,whilethevoltageofL1voltsfor____,voltageL2____V;whentheSisopened,thetableshowsthenumberofVis________v.The6.resistorR1=4inEurope,EuropeanR2=8,circuitparallelaccessto4volts,thetotalcurrentis_____.Ifyouwanttogettheto
6、tal3amps,theR2shouldbereplacedwithaR1resistor______Europeandconnectedintothecircuit.7.asmallbulbatbothendsofthenormalworkingvoltageof3voltsperminute,thefilamentquantityis18,thefilamentresistanceis_____inEurope,thefilamentresistanceincreaseswithincreasingtemperatureand______.8.thereisasmallbulbresi
7、stanceis6.3ohms,iftwoseriesofdrybatterytosupplypowertoit,withtworangeammeter(0.6Aand3A)bymeasuringthecurrentoflightbulb,witha______rangeammeterismoreappropriate.The9.accesscircuitresistance5ohmresistorand10OHMSer
