nsu physics experiment capacitors using phet simulationnsu物理实验电容器用碧仿真

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1、SimulationofaCapacitor-PhETPurposeExplorethepropertiesofasinglesimulatedcapacitor.Calculateandmeasurethecapacitanceofcapacitorswiredinseriesandparallelandothercombinations.Investigation1:Setup(1)Typeinthelastnamesofeachpersoninyourgroupintothefilename.(2)StartuptheComputer(3)OpenyourInter

2、netBrowser(4)Gotohttp://phet.colorado.edu/en/simulation/capacitor-lab(5)Clickonthe“RunNow”button(6)Youshouldseetheimageshownonthenextpage.(6)Checktheboxesindicatedonthefollowingimageanddragthevoltmeterleadssotheytouchthecapacitorplatesasshownbelow:PartI.Relationshipbetweenchargeandvoltage

3、.Procedure(1)Recordthecapacitanceintheblankabovetable1.(2)RecordthetopplatechargeQforthevoltagesettingsintable1.(Movethebatteryvoltageslidertoobtainthesesettings)CapacitancecappF(notep=10-12)Table1Voltage(V)TopPlateCharge(pC)-1.5Q-1.0Q-0.5Q0.0Q0.5Q1.0Q1.5Q(1)OpenMicrosoftExcelandenterthet

4、ableinit.(2)UsescatterplottographChargeonthey-axisversusVoltageonthex-axis.Pastethegraphbelow:GraphofTopPlateChargevsVoltageRecordtheslopeofthelineandcompareittothecapacitancerecordedabove:Slope=slopepF.%diffwithcapacitance=%diff.MinimizeExcelandswitchtothePhETCapacitorLabSimulationWindow

5、.PartII.GeometricFactorsofCapacitance(fixedseparation,d)Procedure(1)Recordtheseparation,d,intheblankabovetable2.(2)Recordthecapacitance,C,fortheAreasettingsintable2.(MovethePlateAreaArrowControltoobtainthesesettings)Separation,d=dmmTable2PlateArea(mm2)Capacitance(pF)100C150C200C250C300C35

6、0C400C(3)Switchbacktothecomputerdesktop(Pressthe“Alt-Esc”keycombination)andopenuptheExcelProgram.ClickonPage2.(4)GraphCapacitanceonthey-axisversusAreaonthex-axis.Useautomaticcurvefit(analyzemenu)andselecttheProportionalfunction.Pastethegraphbelow:GraphofCapacitancevsPlateAreaRecordtheslop

7、eofthelineandcompareittoeo/d(eo=8.85x10-3pF/mm)Slope=slopepF/mm2.eo/d=eo/dpF/mm2.%diff=%diff.MinimizeExcelandswitchtothePhETCapacitorLabSimulationWindow.PartIII.GeometricFactorsofCapacitance(fixedArea,A)Procedure(1)RecordthePlateArea,A,intheblankabovetable3.(2)Recor