雨课堂学堂在线学堂云《College Physics Experiment（西南科技）》单元测试考核答案

第1题TheuncertaintyofmeasurementresultscanbedividedintoClassAcomponentsandClassBcomponentsaccordingtotheassessmentmethod,andtheuncertaintyofClassAcomponentscorrespondstotherandomerrorandClassBcomponentscorrespondstothesystematicerror第2题Accuracyreferstothedegreetowhichthemeasuredvalueortheresultobtainedfromtheexperimentconformstothetruevalue,describesthedegreetowhichthemeasuredvalueisclosetothetruevalue,andreflectsthedegreeofthesizeofthesystematicerror第3题A:errorisamistake,buttheerrorcanbecalculated,whiletheerrorisaneverydayterm,thereisnoqualitativedifferencebetweenthetwo;B:erroranderroraretwocompletelydifferentconcepts,theerrorisunavoidable,whiletheerrorcanbeavoided.C:errorisonlytobeconsideredwhenestimatingtheexperimentalresultsattheendoftheexperiment.D:Thereiserrorwhenthereismeasurement,anderroraccompaniestheexperimentalprocessallthetime,fromschemedesign,instrumentselectiontoresultprocessing,whichisinseparablefromerroranalysis.ThecorrectchoiceisAA,B,C,DareallrightBBandDareright,AandCarewrong COnlyDingiscorrect,allothersarewrongDOnlyCisright,allothersarewrong第4题Intheexperimentofmeasuringultrasonicwavelengthbyphasecomparisonmethod,thedifferencebetweenadjacentextremevaluesisAArithmeticmeanBRelativeTrueValueCTheoreticalvalueDValueofameasurement第5题Inordertoestimatetheerrorofthemeasurementresults,weusetheagreedtruevaluetofindtheerrorinsteadofthetruevalue.WhatcannotbeconsideredasthetruevalueisASystematicerrorscanbeeliminatedbymultiplemeasurementsBChanceerrorsmustbecompletelyeliminatedCThewrongnumberisasystematicerrorDSystematicerrorscanbereducedoreveneliminated第1题ThefollowingexperimentalinstrumentsforthedeterminationofliquidsurfacetensioncoefficientsareASiliconpiezoresistiveforcesensorBVerniercaliperCMetalhangingringDForcesensorconverter正确答案：ABCD第2题Intheexperimentofmeasuringthesurfacetensioncoefficientoftheliquid,thefollowingstatementsarecorrect.ATheleveloftheringmustbeadjustedwell.BWhenrotatingtheliftingplatform,trytomaketheliquidfluctuatingless.CThereshouldbenowindinthelaboratorytoavoidtheswingofthering.DThecurtainsoftheclassroommustbeclosed,andthedarkroomenvironmentisrequired.正确答案：ABC第3题WhatmethodisusedtofitthesensorsensitivityK?ADrawingmethod.BGraphicalmethodCMinimumsquaremethodDDifferencebydifferencemethod第4题Thehorizontaladjustmentdeviationofthemetalringis1%,andtheintroductionerrorofthemeasurementresultsisA1%B0.5%C2%D1.6%第5题Intheexperimentofdeterminingthesurfacetensioncoefficientoftheliquid,thefollowingstatementsarewrong.ATheleveloftheringmustbeadjustedwell.BWhenrotatingtheliftingplatform,trytomaketheliquidfluctuatingless.CThereshouldbenowindinthelaboratorytoavoidtheswingofthering.DThelevelofthemetalringcannotbeadjustedwhenitislaunched.Pre-assignments第1题Thelinearexpansioncoefficientcanbeunderstoodastheratiooftheoriginallengthofthesolidtotheincreasedlengthwhenthetemperaturerisesby1°C.第2题SmalllengthmeasurementmethodsareAOpticalleverageamplificationmethodBOpticalinterferencemethodCMicrometerdirectmeasurementDDirectmeasurementofcursorcaliper正确答案：AB第3题SourceoferrorofmetalwireexpansioncoefficientATestbenchvibrationBMan-madeerrorCThesystemdidnotreachasteadystatetostarttesting.DPoorcontactbetweentheMicrometerandthemetalrod正确答案：ABCD第4题Whenmeasuringtheexpansioncoefficientoftheline,twometalrodsofthesamematerial,thesamelengthanddifferentthicknessareused.Withinacertaintemperaturechangerange,isitsexpansioncoefficientthesame?ADifferenceBUnabletojudgeCSamePre-assignments第1题Whatcan'tbeobtainedbyusingtheHalleffectisAMakeHalldevicesBMaketestinstrumentsforpowerandnon-powerCMeasurethecurrentDMeasurethestrengthoftheelectricfield正确答案：CD第2题ThecorrectdescriptionofthesensitivityofHallfilmKHisAFromtheKHvalueoftheHallchip,theHallcoefficientofthesemiconductormaterialcanbeobtained.BThehighertheelectronconcentrationn,thesmallerthethicknessdoftheHallsheet,andthemoresignificanttheHalleffectmeasured.CKHisanimportantparameterreflectingthestrengthofHalleffectofHallmaterials.DThelargertheKHvalueoftheHallchip,thegreatertheHallvoltageUH.正确答案：ACD第3题TheHalleffectisessentiallyadeflectioncausedbytheactionofmovingchargedparticlesinthemagneticfield.AElectricfieldforceBLorentzForceCAmpereDComprehensiveforce第4题IntheHalleffectexperiment,inordertoeliminateorreducetheinfluenceofadditionalpotential,____measurementscanbeused,thatis,____is,intervertedonebyone.AComparativemeasurementmethod,currentandmagneticfieldBConversionmeasurementmethod,currentandmagneticfieldCSymmetricmeasurement,currentandmagneticfield第5题IntheHalleffectexperiment,theoperatingcurrentISreferstoAThesizeanddirectionofHallvoltageBSawtoothsignalCSinesignalDNonlinearsignalPre-assignments第1题Thelargerthesumofthefourresistorsofthebridgearm,thelowerthesensitivityofthebridge,soitisnotappropriatetochoosetoomuchresistance.第2题Themoresensitivethebridge,thegreaterthemeasurementerror.第3题Afteruse,youmustdisconnectthe"B"and"G"buttonsandconnectthecurrentdetectorconnectortothe"external"position.第4题Whenusingtheboxbridge,thepowerconnectiontimeshouldbeveryshort,thatis,theBandGbuttonscannotbepressedforalongtime.第5题Whichofthefollowingfactorsaffectthesensitivityofthebridge?ASensitivityofflowdetectorBInternalresistanceofthecurrentdetectorCSupplyvoltageDFourresistorsofthebridgearm正确答案：CDPre-assignments第1题Thefollowingstatementabouttheoscilloscopeiscorrect.ATheoscilloscopecanqualitativelyobservethedynamicprocessinthecircuit.BTheoscilloscopecannotbeusedtomeasurethevoltagevalueofnon-sinechanges.CWithsensors,oscilloscopescanalsobeusedfornon-powermeasurements,suchaspressure,acousto-opticsignalsandvariousphysiologicalparameters.DThedoubletraceoscilloscopecanobservetwosignalsatthesametime.正确答案：ACD第2题Observethewaveformwithanoscilloscope.Ifyouseethewaveform,butitisunstable,itcanbeadjustedtomakeitstable.A"ScanFrequency"adjustmentB"ScanningFrequency"and"Focus"areadjustedtogetherC"Triggerlevel"adjustmentDThe"scanningfrequency"isadjustedwiththe"triggerlevel"第3题Oscilloscopeisanobservationinstrumentthatshowsthewaveformofelectricalsignalsovertime.ItsbasicprincipleisAThedeflectionoftheelectronbeamintheelectricormagneticfieldBTheinteractionbetweenchargesCPrincipleofelectromagneticinductionDTheinteractionbetweencurrents第4题TodisplaythesinesignaladdedtotheoscilloscopeYdeflectionboardontheoscilloscopescreen,theXdeflectionboardmustbeadded.ASquarewavesignalBSawtoothsignalCSinesignalDNonlinearsignalPre-assignments第1题Lightofdifferentwavelengthshasthesameminimumdeflectionangleforthesameprism.第2题Thethreeverticalsofthespectrometeraretheverticalcenteraxisofthetelescopeopticalaxis;theverticalcenteraxisofthecarrierplatform;andtheverticalcenteraxisoftheparallellighttube.第3题Themethodofmodulatingthecarrierplatformandthetelescoperespectively,sothattheimageishalfback,andfinallyreturningtothesymmetrypointiscalledthe"halfmethod"第4题WhethertheleastdeflectionanglemethodcanbeusedtomeasuretherefractiveindexofitsmaterialforaprismwithanyvertexangleA?第5题Thespectrometerdesignstwocursorstoreduceeccentricity.Pre-assignments第1题Regardingthesplittip,thefollowingstatementiscorrect.AItisanequal-tiltinterferencestripeoflight.BItisanequalthicknessinterferencestripeoflight.CStraightstripesareparalleltoeachotherDThestripesaresparse.正确答案：BCD第2题Inequalthicknessinterference,thetwobeamsofinterferencecomefromAUpperandlowersurfacesoftheupperglassBTheupperandlowersurfacesoftheglassbelowCUpperglasslowersurfaceandlowerglassuppersurfaceDUpperglassuppersurfaceandlowerglassuppersurface第3题RegardingNewton'sringinterferencefringes,thefollowingstatementiscorrectAItisanequal-tiltinterferencestripeoflight.BItisanequalthicknessinterferencestripeoflight.CThespacingbetweenthestripesremainsunchangedfromtheinsideout.DStripesgraduallybecomethinnerfromtheinsideout.第4题Whatisthereadingmicr