分析详解试题

MARKSCHEMEfortheOctober/November2011questionpaperfortheguidanceofteachers97029702Paper5 ysisandumrawmarkThismarkschemeispublishedasanaidtoteachersandcandidates,toindicatetherequirementsoftheexamination.ItshowsthebasisonwhichExaminerswereinstructedtoawardmarks.ItdoesnotindicatethedetailsofthediscussionsthattookceatanExaminers’meetingbeforemarkingbegan,whichwouldhaveconsideredtheacceptabilityofalternativeanswers.Markschemesmustbereadinconjunctionwiththequestionpapersandthereportonthe CambridgeispublishingthemarkschemesfortheOctober/November2011questionpapersformostIGCSE,GCEAdvancedLevelandAdvancedSubsidiaryLevelsyllabusesandsomeOrdinaryLevel nning(15Definingtheproblem(3 AisthetvariableandVisthedependentvariableorvaryAandmeasureV. KeepthenumberofturnsoncoilYorcoilX Keepthe oilX Methodsof ollection(5M1TwotcoilslabelledXandY;coilYwoundovercoil M2Alternatingpowersupply/signalgeneratorconnectedtocoil M3CoilYconnectedtovoltmeter/c.r.o.inaworkable M4Measurediameter/radius/lengthswitharuler/vernier M5Methodtodetermine Method ysis(2 PlotagraphofV Relationshipvalidifstraight hrough Safetyconsiderations(1 Precautionlinkedto(large)current oil/heating,e.g.switchoffwhennotinusetoavoidoverheatingcoil;donottouchcoilbecauseitishot. Relevantpoints Uselargecurrent oilX/largenumberofturns/highfrequencya.c.toproducemeasurableDetailonmeasuringe.m.f.,e.g.height×y-gainonKeepfrequencyofpowersupplyUseofrheostattokeepcurrent coilMonitorwitha.c.AvoidotheralternatingmaicRepeatmeasurementforrordorlengthsandDonotallowvaguecomputer[Total:0.111or1.320–0.200or0.111or1.320–0.200or2.295–0.273or3.189–0.333or3.842–0.385or4.41–0.429or4.84–ExpectedAllowT1forratiovalues:Ignoresfin 2T2forvRows1–4to3s.f.or4Rows5–6to2s.f.or3From±0.02or±0.03,to±Allowmorethanonesignificant SixpointsplottedMustbewithinhalfasmallsquare.Donotallow‘blobs’(morethanhalfasmallEcfallowedfrom2ErrorbarsinvplottedAllerrorbarstobeplotted.Checkthirdandplot.Mustbeaccuratetolessthanhalfasmallsquare. (LineofbestIfpointsareplottedcorrectlythenlowerendoflineshouldpassbetween(0.10,1.16)and(0.10,1.24)andupperendoflineshouldpassbetween(0.45,5.12)and(0.45,5.20).Allowecffrompointsplottedorrectly–examinerWorstacceptablestraightline.Steepestorshallowestpossiblelinethatpassesthroughalltheerrorbars.Lineshouldbeclearlylabelledordashed.Shouldpassfromtopoftoperrorbartobottomofbottomerrorbarorbottomoftoperrorbartotopofbottomerrorbar.Markscoredonlyiferrorbarsareplotted.(c)(Gradientofbestfitlhetriangleusedshouldbeatleasthalflengthofthedrawnline.Checkthereadoffs.Worktohalfasmallsquare.DonotpenalisePOT.UncertaintyinMethodofdeterminingabsoluteuncertainty.Differenceinworstgradientandgradient.g=gradient/2h=gradient/Allowecffrom(c)(i).AbsoluteuncertaintyinUsesworstDonotcheckRatio=0.6/(0.6+1.8)=Expecttosee1.00addedandlargest3v 2×0.25×g×0.6 orv orv= v2readfromgraphforratio0.25.Mustbeinrange.Allow1.7.Allowecf.Expecttoseedifferencweenbestandworstvalues.[Total:UncertaintiesinQuestion(i)GradientUncertainty=gradientoflineofbestfit–gradientofworstacceptablelineUncertainty= v v

×∆g 剑桥大学国际考试GCE高级附属级别和GCE高级级别计划2011年10月/11月试卷，供教97029702/535（规划、分析和评估）IGCSE、GCE201110/112GCEAS/ALEVEL201110/1197021规划（15）定义问题（3）PA，VAV[1]PYX[1]PXM1XYYX[1]M2X[1M3/c.r.oY[1M4尺/游标卡尺测量直径/半径/长度。[1]M5确定面积的方法。[1]AVA1摸线圈，因为它很热。[1]D[4]1X2CROy34X567rd或长度和平均值。20113GCEAS/ALEVEL201110/119702a)A12gh2hgT1T20.1110.11111.3201.3210.2000.20002.2952.3100.2733.1893.2040.3330.33333.8423.8460.3850.38464.414.450.4290.42864.844.94ndT12sf2T2v1-4345-623U10.020.030.2(i)G1（超过半个小方块Ecfc)()G2最佳拟合线如果点绘制正确，则线的下端应在(0.10,1.16)和(0.10,1.24)之(0.45,5.12(0.45)，5.20）G3(个小正方形。不要惩罚POT。C2g/2h/1.2(c)(i)ecf。U4g的绝对不确定度使用最差梯度。不检查计算。C30.6/(0.61.80.251.00mC4