SAT物理测试题

1.Thesetofletteredchoicesbelowreferstomultiplequestions.Selecttheoneletteredchoicethatbestanswerseachquestion.Achoicemaybeusedonce,morethanonce,ornotatallineachset.Whichgraphrepresentsthetotalheatdevelopedfromtimebyaresistorcarryingasteadycurrent?(A)(B)(C)(D)(E)2.Thesetofletteredchoicesbelowreferstomultiplequestions.Selecttheoneletteredchoicethatbestanswerseachquestion.Achoicemaybeusedonce,morethanonce,ornotatallineachset.Whichgraphbestrepresentsthemagneticfieldestablishedatthecenterofacoilbyasteadycurrentinthecoil?(A)(B)(C)(D)(E)3.Thesetofletteredchoicesbelowreferstomultiplequestions.Selecttheoneletteredchoicethatbestanswerseachquestion.Achoicemaybeusedonce,morethanonce,ornotatallineachset.Thisquestionrelatestoapointchargefixedinposition,asshowninthediagram.Fivepointsnearthechargeandintheplaneofthepageareshown.Atwhichpointwillthemagnitudeoftheelectricfieldbeleast?(A)PointA(B)PointB(C)PointC(D)PointD(E)PointE4.Thesetofletteredchoicesbelowreferstomultiplequestions.Selecttheoneletteredchoicethatbestanswerseachquestion.Achoicemaybeusedonce,morethanonce,ornotatallineachset.Thisquestionrelatestoapointcharge+Qfixedinposition,asshowninthediagram.Fivepointsnearthechargeandintheplaneofthepageareshown.Atwhichpointwillanelectronexperienceaforcedirectedtowardthetopofthepage?(A)A(B)B(C)C(D)D(E)E5.Thesetofletteredchoicesbelowreferstomultiplequestions.Selecttheoneletteredchoicethatbestanswerseachquestion.Achoicemaybeusedonce,morethanonce,ornotatallineachset.Abeamoflightisincidentonarectangularopeninginthefrontofabox,asshowninthesideviewabove.Thebackoftheboxisopen.Afterpassingthroughthebox,thelightisincidentonascreen.Thefollowingdevicesmaybeinthebox,positionedasshown.Whichdevicecouldproduceatinyspotoflightonthescreen?(A)(B)(C)(D)(E)6.Thesetofletteredchoicesbelowreferstomultiplequestions.Selecttheoneletteredchoicethatbestanswerseachquestion.Achoicemaybeusedonce,morethanonce,ornotatallineachset.Abeamoflightisincidentonarectangularopeninginthefrontofabox,asshowninthesideviewabove.Thebackoftheboxisopen.Afterpassingthroughthebox,thelightisincidentonascreen.Thefollowingdevicesmaybeinthebox,positionedasshown.Whichdevicecouldproduceadiffractionpatternconsistingofacentralbrightfringewithparallelsecondaryfringesthatdecreaseinintensitywithincreasingdistancefromthecenterofthescreen?(A)(B)(C)(D)(E)7.Eachofthefouridenticalcartsshownaboveisloadedwithatotalmassofkilograms.Allofthecartsareinitiallyatrestonthesamelevelsurface.Forcesofthesamemagnitudedirectedtotherightactoneachofthecartsforthesamelengthoftime.Iffrictionandairresistancearenegligible,whichcartwillhavethegreatestvelocitywhentheforcesceasetoact?(A)Cart(B)Cart(C)Cart(D)Cart(E)Allfourcartswillhavethesamevelocity.8.Thehalf-lifeofoneisotopeofradiumisaboutyears.Inagivensampleofthisisotope,oftheradiumatomswilldecayinatimemostnearlyequalto(A)years(B)years(C)years(D)years(E)years9.Ablockispulledalongahorizontalsurfacewithaconstanthorizontalforceofmagnitude.Thesurfaceexertsafrictionalforceofconstantmagnitudeontheblock.Thegraphofspeedasafunctionoftimefortheblockisshownabove.If,instead,theblockslideswithoutfrictionbutispulledwiththesamehorizontalforceofmagnitude,whichofthefollowingwouldbeapossiblenewgraphofspeedasafunctionoftime?(Thedashedlinerepresentstheoldgraph.)(A)(B)(C)(D)(E)10.Ablockispulledalongahorizontalsurfacewithaconstanthorizontalforceofmagnitude.Thesurfaceexertsafrictionalforceofconstantmagnitudeontheblock.Thegraphofspeedasafunctionoftimefortheblockisshownabove.Whichofthefollowingshowsthegraphofaccelerationaasafunctionoftimefortheblock?(A)(B)(C)(D)(E)11.Whenavectorofmagnitude6unitsisaddedtoavectorofmagnitude8units,themagnitudeoftheresultantvectorwillbe(A)exactlyunits(B)exactlyunits(C)exactlyunits(D)units,units,orsomevaluebetweenthem(E)units,units,orsomevaluebetweenthem12.A-kilogramblockissuspendedbyacordfromtheceiling,asshownabove.Theforceexertedontheblockbythecordismostnearly(A)zero(B)N(C)N(D)N(E)N13.WhichofthefollowinggraphsbestrepresentsthekineticenergyKofanelementaryparticleasafunctionofitsspeedv,wherecisthespeedoflight?(A)(B)(C)(D)(E)14.Aknownpositivechargeislocatedatpointasshownabove,betweentwounknowncharges,and.isclosertothan.Ifthenetelectricforceactingonthechargeatiszero,itmaycorrectlybeconcludedthat:(A)Bothandarepositive(B)Bothandarenegative(C)andhaveoppositesigns(D)andhavethesamesign,butthemagnitudeofisgreaterthanthemagnitudeof(E)andhavethesamesign,butthemagnitudeofisgreaterthanthemagnitudeof15.Twosmallconductingspheresareidenticalexceptthatspherehasachargeofmicrocoulombsandspherehasachargeofmicrocoulombs.Afterthespheresarebroughtincontactandthenseparated,whatisthechargeoneachsphere,inmicrocoulombs?(A)SphereSphere(B)SphereSphere(C)SphereSphere(D)SphereSphere(E)SphereSphere16.AsatellitemovinginacircularorbitwithrespecttotheEarth'scenterexperiencesagravitationalforce.Ifthesatelliteisputintoanewcircularorbitofsmallerradius,howwillthegravitationalforceandthespeedofthesatellitechange,ifatall?(A)GravitationalForceSpeedDecreaseDecrease(B)GravitationalForceSpeedDecreaseIncrease(C)GravitationalForceSpeedRemainthesameRemainthesame(D)GravitationalForceSpeedIncreaseDecrease(E)GravitationalForceSpeedIncreaseIncrease17.Apendulumisswingingupwardandishalfwaytowarditshighestposition,asshownabove,whenthestringbreaks.Whichofthepathsshownbestrepresentstheonethattheballwouldtakeafterthestringbreaks?(A)A(B)B(C)C(D)D(E)E18.Iftheadditionofjoulesofheattokilogramsofasubstanceraisesitstemperature,thespecificheatofthesubstanceis(A)(B)(C)(D)(E)19.Anobjectwithmassandspeeddirectedtotherightstrikesawallandreboundswithspeeddirectedtotheleft.Thechangeintheobject'skineticenergyis(A)(B)(C)(D)(E)20.Ateachermeasuresandrecordsherownmasstoanaccuracyofbetterthanpercent.Whichofthefollowingismostlikelythemassthatsherecorded?(A)(B)(C)(D)(E)21.Anexperimentisperformedtomeasurethespecificheatofcopper.Alumpofcopperisheatedinanoven,thendroppedintoabeakerofwater.Tocalculatethespecificheatofcopper,theexperimentermustknowormeasurethevalueofallofthequantitiesbelowEXCEPTthe(A)massofthewater(B)originaltemperaturesofthecopperandthewater(C)final(equilibrium)temperatureofthecopperandthewater(D)timetakentoachieveequilibriumafterthecopperisdroppedintothewater(E)specificheatofthewater22.Inagivenprocess,12joulesofheatisaddedtoanidealgasandthegasdoes8joulesofwork.Whichofthefollowingistrueabouttheinternalenergyofthegasduringthisprocess?(A)Ithasincreasedbyjoules.(B)Ithasincreasedbyjoules.(C)Ithasnotchanged.(D)Ithasdecreasedbyjoules.(E)Ithasdecreasedbyjoules.23.Whichofthefollowingistrueofthemagneticfieldproducedbyacurrentinalong,straightwire?(A)Thefieldisuniform.(B)Thefieldincreasesinstrengthasthedistancefromthewireincreases.(C)Thefieldlinesaredirectedparalleltothewire,butoppositetothedirectionofthecurrent.(D)Thefieldlinesaredirectedradiallyoutwardfromthewire.(E)Thefieldlinesformcirclesaboutthewire.24.Asingleresistorisconnectedtoabatteryasshownabove.Thecurrentisandthepowerdissipatedasheatis.Thecircuitischangedbydoublingtheemfofthebatterywhileiskeptconstant.Afterthechange,thecurrentis(A)(B)(C)(D)(E)25.Asingleresistorisconnectedtoabatteryasshownabove.Thecurrentisandthepowerdissipatedasheatis.Thecircuitischangedbydoublingtheemfofthebatterywhileiskeptconstant.Afterthechange,thepowerdissipatedinis(A)(B)(C)(D)(E)26.Anobjectwithmassandspeeddirectedtotherightstrikesawallandreboundswithspeeddirectedtotheleft.Thechangeintheobject'smomentumis(A)directedtotheleft(B)directedtotheleft(C)(D)directedtotheright(E)directedtotheright27.Thethreelowestenergylevelsofanatomareshownabove.Anatominthestatecan,inasingletransition,spontaneouslyemitaphotonhavinganenergyof(A)only(B)only(C)only(D)oronly(E)oronly28.Aball,initiallyatrestatseconds,rollswithconstantaccelerationdownaninclinedplanemeterslong.Iftheballrollsmeterinthefirstseconds,howfarwillithaverolledatseconds?(A)(B)(C)(D)(E)29.Abarmagnetislocatednexttoacoilofwirethatisfixedinpositionandconnectedtoanammeter,asshownabove.Therewillbeaninducedelectriccurrentthroughtheammeterifthemagnetismovinginwhichofthefollowingways?I.TowardthecoilwithconstantspeedII.TowardthecoilwithincreasingspeedIII.AwayfromthecoilwithconstantspeedIV.Awayfromthecoilwithincreasingspeed(A)oronly(B)oronly(C)oronly(D)oronly(E)ororor30.A-kilogramdiskslidesoverlevelicetowardtheeastatavelocityofmeterpersecond,asshownabove.Thediskstrikesapostandreboundstowardthenorthatthesamespeed.Thechangeinthemagnitudeoftheeastwardcomponentofthemomentumofthediskis(A)(B)(C)(D)(E)31.Threeenergylevelsofanatomareshownabove.Atomsinthestatecanspontaneouslyemitphotonshavingwhichofthefollowingenergies?(A)eVonly(B)eVonly(C)eVandeVonly(D)eVandeVonly(E)eV,eV,eV32.Aboxofmassmisreleasedfromrestatpositiononthefrictionlesscurvedtrackshownabove.Itslidesadistancedalongthetrackintimettoreachposition,droppingaverticaldistanceh.Letvandabetheinstantaneousspeedandinstantaneousacceleration,respectively,oftheboxatposition.Whichofthefollowingequationsisvalidforthissituation?(A)(B)(C)(D)(E)33.TheEarthhasaradiusofkilometers.AsatelliteorbitstheEarthatadistanceofkilometersfromthecenteroftheEarth.IftheweightofthesatelliteonEarthiskilonewtons,thegravitationalforceonthesatelliteinorbitis(A)kilonewtons(B)kilonewtons(C)kilonewtons(D)kilonewtons(E)kilonewtons34.Apendulumoflengthwithabobofmassmisoscillatingwithsmallamplitude.Whichofthefollowingchangesinthependulumwoulddoubleitsperiod?(A)Doublingthemassmofthebob(B)Doublingtheinitialforceusedtosetthependuluminmotion(C)Doublingtheamplitudeofthependulum’sswing(D)Quadruplingthemassmofthebob(E)Quadruplingthelengthofthependulum35.Apieceofchalkisthrownverticallyupwardandcaughtduringitsdescentatthesameheightfromwhichitwasthrown.Positionismeasuredfromthelocationofthechalkwhenitleftthehand.Thepositivedirectionforposition,velocity,andaccelerationisupward.Whatarethesignsoftheposition,velocity,andaccelerationduringtheascendingpartofthetrajectory?(A)(B)(C)(D)(E)36.Apieceofchalkisthrownverticallyupwardandcaughtduringitsdescentatthesameheightfromwhichitwasthrown.Positionismeasuredfromthelocationofthechalkwhenitleftthehand.Thepositivedirectionforposition,velocity,andaccelerationisupward.Whatarethesignsoftheposition,velocity,andaccelerationduringthedescendingpartofthetrajectory?(A)(B)(C)(D)(E)