剑桥联盟物理 Cambridge physics AS+A2-9702_w17_qp_12

CambridgeInternationalExaminationsCambridgeInternationalAdvancedSubsidiaryandAdvancedLevelPHYSICS9702/12Paper1MultipleChoiceOctober/November20171hour15minutesAdditionalMaterials:MultipleChoiceAnswerSheet*7470697625SoftcleaneraserSoftpencil(typeBorHBisrecommended)READTHESEINSTRUCTIONSFIRSTWriteinsoftpencil.Donotusestaples,paperclips,glueorcorrectionfluid.Writeyourname,CentrenumberandcandidatenumberontheAnswerSheetinthespacesprovided*unlessthishasbeendoneforyou.DONOTWRITEINANYBARCODES.Therearefortyquestionsonthispaper.Answerallquestions.ForeachquestiontherearefourpossibleanswersA,B,CandD.ChoosetheoneyouconsidercorrectandrecordyourchoiceinsoftpencilontheseparateAnswerSheet.ReadtheinstructionsontheAnswerSheetverycarefully.Eachcorrectanswerwillscoreonemark.Amarkwillnotbedeductedforawronganswer.Anyworkingshouldbedoneinthisbooklet.Electroniccalculatorsmaybeused.Thisdocumentconsistsof20printedpages.IB1711_9702_12/2RP©UCLES2017[Turnover2Data8–1speedoflightinfreespacec=3.00×10ms–7–1permeabilityoffreespaceµ=4π×10Hm0–12–1permittivityoffreespaceε=8.85×10Fm019–1(=8.99×10mF)4πε0–19elementarychargee=1.60×10C–34thePlanckconstanth=6.63×10Js–27unifiedatomicmassunit1u=1.66×10kg–31restmassofelectronme=9.11×10kg–27restmassofprotonmp=1.67×10kg–1–1molargasconstantR=8.31JKmol23–1theAvogadroconstantNA=6.02×10mol–23–1theBoltzmannconstantk=1.38×10JK–112–2gravitationalconstantG=6.67×10Nmkg–2accelerationoffreefallg=9.81ms©UCLES20179702/12/O/N/173Formulae12uniformlyacceleratedmotions=ut+2at22v=u+2asworkdoneon/byagasW=p∆VGmgravitationalpotentialφ=–rhydrostaticpressurep=ρgh1Nm2pressureofanidealgasp=3V2simpleharmonicmotiona=–ωxvelocityofparticleins.h.m.v=v0cosωt22v=±ω(x0−x)fvDopplereffect=sfov±vselectricpotentialV=Q4πε0rcapacitorsinseries1/C=1/C1+1/C2+...capacitorsinparallelC=C1+C2+...1energyofchargedcapacitorW=2QVelectriccurrentI=AnvqresistorsinseriesR=R1+R2+...resistorsinparallel1/R=1/R1+1/R2+...BIHallvoltageV=Hntqalternatingcurrent/voltagex=x0sinωtradioactivedecayx=x0exp(–λt)decayconstantλ=0.693t12©UCLES20179702/12/O/N/17[Turnover41WhichpairofunitsarenotthesamewhenexpressedinSIbaseunits?–2–1AmsandNkg–1BNsandkgms–2CPaandNm–2–1DVmandNC2Whatistheverticalcomponentofthisdisplacementvector?5.0km37°horizontalA3.0kmB3.8kmC4.0kmD5.0km–1–13TheunitsofspecificheatcapacityareJkgK.WhataretheSIbaseunitsofspecificheatcapacity?–2–1–1–12–2–12–1–1AmsKBmsKCmsKDmsK4Aquantityyistobedeterminedfromtheequationshown.pxy=2qThepercentageuncertaintiesinp,xandqareshown.percentageuncertaintyp6%x2%q4%Whatisthepercentageuncertaintyiny?A0.5%B0.75%C12%D16%©UCLES20179702/12/O/N/1755Atransmitteremitsapulseofelectromagneticwavestowardsareflector.Thepulseisreflectedandreturnstothetransmitter.Adetectorislocatedatthetransmitter.Theemittedpulseandthereflectedpulsearedisplayedonacathode-rayoscilloscope(c.r.o.)asshown.1cm1cmThepulsetakes6.3µstotravelfromthetransmittertothereflector.Whatisthetime-basesettingofthec.r.o.?–1–1–1–1A2.1µscmB3.2µscmC4.2µscmD6.3µscm–16Ahot-airballoonismovingverticallyupwardswithaconstantspeedof3.00ms.Asandbagisdroppedfromtheballoon.Ittakes5.00sforthesandbagtofalltotheground.Whatwastheheightoftheballoonwhenthesandbagwasreleased?A29mB108mC123mD138m©UCLES20179702/12/O/N/17[Turnover67Thevelocity-timegraphforatrainstartingatonestationandstoppingatthenextisshown.velocity00timeAnothertrainhasdoubletheaccelerationbutthesamemaximumspeedandthesamedeceleration.Whichvelocity-timegraph,onthesamescale,showsthemotionofthistrainbetweenthesamestations?ABvelocityvelocity000time0timeCDvelocityvelocity000time0time©UCLES20179702/12/O/N/1778Astoneisreleasedfromrestandfallsalongdistanceinair.Whichgraphcouldshowthevariationwithtimetoftheaccelerationaofthestone?ABaa000t0tCDaa00tt009Aslowvehicleandafastvehicletraveltowardseachotherinastraightlineandthencollide.Whichoutcomeisneverpossible,regardlessofthemassesofthevehicles?ABothvehiclesstop.BOnlyonevehiclestops.CThefastvehicle’sspeedincreases.DTheslowvehicle’sspeedincreases.©UCLES20179702/12/O/N/17[Turnover810TwoblocksofmassesMandmarejoinedbyathinstringwhichpassesoverafrictionlesspulley,asshown.pulleyastringMmaTheaccelerationoffreefallisg.Whatistheaccelerationaofthetwoblocks?(M+m)(M–m)MmAgBgCgDg(M–m)(M+m)mM11Thediagramshowsablockofcoppersuspendedinwater.faceSfaceRTheblockexperiencesanupthrustfromthewater.Whichstatementisthebasisofanexplanationforthisupthrust?ACopperismoredensethanwater.BTheareaoffaceRisgreaterthantheareaoffaceS.CThedensityofwaterincreaseswithdepth.DThepressureofwaterincreaseswithdepth.©UCLES20179702/12/O/N/17912ThediagramshowsasolidcubewithweightWandsidesoflengthL.Itissupportedatrestbyafrictionlessspindlethatpassesthroughthecentresoftwooppositeverticalfaces.Oneofthesefacesisshaded.LThespindleisnowremovedandreplacedatadistanceLtotherightofitsoriginalposition.4L4Whenviewingtheshadedface,whatisthetorqueofthecouplethatwillnowbeneededtokeepthecubeatrest?WLAanticlockwise4WLBclockwise4WLCanticlockwise2WLDclockwise2©UCLES20179702/12/O/N/17[Turnover1013Astreetlampisfixedtoawallbyametalrodandacable.cablewallPmetalrodlampWhichvectortrianglecouldrepresenttheforcesactingatpointP?ABCD14TworigidsteelbeamsXYandYZarefixedattheirlowerendsandarehingedatY.Eachbeamis4inclinedat50°tothehorizontal,asshown.Aweightof4.0×10NhangsfromY.Thestructureisinequilibrium.Yhingesteelbeamsteelbeam4.0×104N50°50°XZWhatistheforceexertedbyeachbeamonthehingeatY?4444A2.6×10NB3.1×10NC5.2×10ND6.2×10N©UCLES20179702/12/O/N/171115AiristrappedinsideaglassbulbwhichisimmersedinwaterandattachedtoaU-tubecontainingmercury.Thedensitiesofwaterandmercuryareρwandρmrespectively.ThesurfaceofthewaterisopentotheatmospherewhereatmosphericpressureisP.atmosphericpressurePwatersurfaceglassbulbwaterρdensitywairhwhmU-tubemercuryρdensitymTheaccelerationoffreefallisg.Whatisthepressureoftheairintheglassbulb?AP+gρwhw+gρmhmBP+gρwhw–gρmhmCgρwhw+gρmhmDgρwhw–gρmhm16Aballofmassmisthrownuptoheighthinairwithaninitialvelocityv,asshown.vhPQAirresistanceisnegligible.Theaccelerationoffreefallisg.WhatisthetotalworkdonebythegravitationalforceontheballduringitsflightfromPtoQ?12AzeroB2mvCmghD2mgh©UCLES20179702/12/O/N/17[Turnover1217AconstantforceF,actingonacarofmassm,movesthecarupaslopethroughadistancesatconstantvelocityv.Theangleoftheslopetothehorizontalisα.sFαgravitationalpotentialenergygainedbycarWhatistheratio?workdonebyforceF2mgssinαmvmgsinαABCmvDFvFs2FsF18CarXistravellingathalfthespeedofcarY.CarXhastwicethemassofcarY.Whichstatementiscorrect?ACarXhashalfthekineticenergyofcarY.BCarXhasonequarterofthekineticenergyofcarY.CCarXhastwicethekineticenergyofcarY.DThetwocarshavethesamekineticenergy.19Duringrefuelling,apetrolcarreceives50litresoffuelin90seconds.Thepetrolhas34MJofenergyperlitre.Foranelectriccartoreceivethesameamountofenergyinthesametimefroma230Vsupply,whatistheminimumcurrentrequired?468A2700AB8.2×10AC7.4×10AD6.6×10A©UCLES20179702/12/O/N/171320Aboltissubjectedtoatensileforce,asshown.boltXYtensiletensile2ddforceforceThebolthasacircularcross-section.AtendXthediameteris2d.AtendYthediameterisd.WhatistheratiostressatY?stressatXA0.25B0.50C2.0D4.021Arectangularblockofsteelsupportingaverylargecomponentofabridgehasaheightof15cmandacross-sectionof20cm×12cm.Itisdesignedtocompress1mmwhenundermaximum,evenlydistributed,load.11–2TheYoungmodulusofsteelis2.0×10Nm.Whatisthemaximumloaditcansupport?A32MNB56GNC720GND32TN©UCLES20179702/12/O/N/17[Turnover1422Whensoundtravelsthroughair,theairparticlesvibrate.Agraphofdisplacementagainsttimeforasingleairparticleisshown.displacement00T2TtimeWhichgraphbestshowshowthekineticenergyoftheairparticlevarieswithtime?ABkinetickineticenergyenergy000T2Ttime0T2TtimeCDkinetickineticenergyenergy000T2Ttime0T2Ttime23Whichwaveisalongitudinalwave?AalightwavetravellingthroughairBaradiowavefromabroadcastingstationCarippleonthesurfaceofwaterDasoundwavetravellingthroughair©UCLES20179702/12/O/N/171524Avibratingtuningforkisheldaboveaglasscylinderfilledtothetopwithwater.Thewaterlevelissteadilylowered.Aloudsoundisfirstheardwhenthewaterlevelis83.5cmabovethebench.Thenextloudsoundisheardwhenthewaterlevelis17.1cmabovethebench.tuningforkNOTTOcylinderSCALEwater83.5cmwater17.1cm–1Thespeedofsoundinairis340ms.Whatisthefrequencyofthetuningfork?A128HzB256HzC384HzD512Hz25Atrainthatismovinginastraightlinealongarailwaytrackhasawhistlethatcontinuouslyemitssoundoffrequencyf.Awomanstandingbythesideofthetrackhearssoundoffrequency0.85f.–1Thespeedofsoundintheairis340ms.Whatisthevelocityofthetrain?–1A51msawayfromthewoman–1B51mstowardsthewoman–1C60msawayfromthewoman–1D60mstowardsthewoman26Orangelightinavacuumhasawavelengthof600nm.Whatisthefrequencyofthislight?51114A180HzB5.0×10HzC1.8×10HzD5.0×10Hz27Astationarysoundwavehasaseriesofnodes.Thedistancebetweenthefirstandthesixthnodeis30.0cm.Whatisthewavelengthofthesoundwave?A5.0cmB6.0cmC10.0cmD12.0cm©UCLES20179702/12/O/N/17[Turnover1628Whichdiagramshowsthediffractionofwaterwavesinarippletank?ABCD29Ahillstandsbetweenaradiotransmitterandahouse,asshown.hillhouseradiotransmitterTheradiotransmittercannotbeseenfromthehouse,butradiowavesfromthetransmitterarereceivedatthehouse.Whyisthis?AThewavelengthoflightislongerthanthewavelengthofradiowavessothereismorediffractionoflightoverthehill.BThewavelengthoflightisshorterthanthewavelengthofradiowavessothereismorediffractionoflightoverthehill.CThewavelengthofradiowavesislongerthanthewavelengthoflightsothereismorediffractionofradiowavesoverthehill.DThewavelengthofradiowavesisshorterthanthewavelengthoflightsothereismorediffractionofradiowavesoverthehill.©UCLES20179702/12/O/N/171730Inanexperimenttodemonstratedouble-slitinterferenceusinglight,thedistancefromtheslitstothescreenisdoubledandtheslitseparationishalved.Thewavelengthofthelightiskeptconstant.Bywhichfactordoestheseparationofadjacentbrightfringeschange?A1B1C2D44231Thediagramshowstwometalplatesconnectedtoaconstanthighvoltage.dWhichgraphshowsthevariationoftheelectricfieldstrengthEmidwaybetweenthetwoplatesasthedistancedbetweenthetwoplatesisincreased?ABCDEEEE00000d0d0d0d32AnelectronmovesbetweentwopointsXandYinauniformelectricfield,asshown.YuniformelectricfieldXThedistancebetweenXandYis4.0cmandthelineXYisatanangleof60°tothedirectionofthefield.Thefieldexertstheonlyforceontheelectron.–1Thefieldstrengthis100NC.WhatisthechangeinthekineticenergyoftheelectronasitmovesfromXtoY?A–4eVB–2eVC+2eVD+4eV©UCLES20179702/12/O/N/17[Turnover1833Twocopperwiresarejoinedtogetherandcarryacurrent,asshown.currentcurrentwirePwireQdiameterddiameter2dWirePhasdiameterdandwireQhasdiameter2d.averagedriftspeedofthefreeelectronsinwirePWhatistheratio?averagedriftspeedofthefreeelectronsinwireQA1B1C2D44234AcellofnegligibleinternalresistanceisconnectedtoresistorsR1,R2andR3,asshown.Thecellprovidespowertothecircuitandpowerisdissipatedintheresistors.R1R2R3Whichwordequationmustbecorrect?ApowerlossinR1=powerlossinR2+powerlossinR3BpowerlossinR2=powerlossinR3Cpoweroutputofcell=powerlossinR1+powerlossinR2+powerlossinR3Dpoweroutputofcell=powerlossinR135Whichgraphrepresentsametallicconductor,wheretheresistanceoftheconductorisgivenbythegradientofthegraph?ABCDVVII0000II000V0V©UCLES20179702/12/O/N/171936Atypicalmobilephonebatteryhasane.m.f.of5.0Vandaninternalresistanceof200mΩ.Whatistheterminalp.d.ofthebatterywhenitsuppliesacurrentof500mA?A4.8VB4.9VC5.0VD5.1V37ThecircuitshowncontainsaresistorSthatisneitherinseriesnorinparallelwiththeotherresistors.12.0V0.50Ω3.0A4.0A0.5ASRRKirchhoff’slawscanbeusedwiththedatainthediagramtodeducetheresistanceofeachofthetwoidenticalresistorslabelledR.WhatistheresistanceofeachresistorR?A3.0ΩB4.0ΩC4.8ΩD5.0Ω38Thediagramshowsapotentialdividerconnectedtoa12Vsupplyofnegligibleinternalresistance.300Ω12VX0–100ΩYWhichrangeofvoltagescanbeobtainedbetweenXandY?A0to3VB0to4VC0to8VD0to9V©UCLES20179702/12/O/N/17[Turnover2039Thediagramshowsasequenceofradioactivedecaysinvolvingthreeα-particlesandaβ–particle.αβ–αα23793NpQRSTWhatisnuclideT?225231225229A88RaB88RaC90ThD90Th40Whichcombinationofup(u)anddown(d)quarksformsaneutron?AuuuBuudCuddDdddPermissiontoreproduceitemswherethird-partyownedmaterialprotectedbycopyrightisincludedhasbeensoughtandclearedwherepossible.Everyreasonableefforthasbeenmadebythepublisher(UCLES)totracecopyrightholders,butifanyitemsrequiringclearancehaveunwittinglybeenincluded,thepublisherwillbepleasedtomakeamendsattheearliestpossibleopportunity.Toavoidtheissueofdisclosureofanswer-relatedinformationtocandidates,allcopyrightacknowledgementsarereproducedonlineintheCambridgeInternationalExaminationsCopyrightAcknowledgementsBooklet.Thisisproducedforeachseriesofexaminationsandisfreelyavailabletodownloadatwww.cie.org.ukaftertheliveexaminationseries.CambridgeInternationalExaminationsispartoftheCambridgeAssessmentGroup.CambridgeAssessmentisthebrandnameofUniversityofCambridgeLocalExaminationsSyndicate(UCLES),whichisitselfadepartmentoftheUniversityofCambridge.©UCLES20179702/12/O/N/17