1

Lab2-Introductiontoresistors,breadboardandmultimetersTodothislabyouwillneed:thebreadboard,multimeter,3resistorsanda9vbatterywithitsclips

1. Getyourmultimeterandtwoprobes.2. Turnthemultimeteronandswitchthedialtothe“Ohm”range.3. Nowverifybasicfunctionbygentlytouchingtheprobestogether.4. Commentonwhathappens

5. Usingyourfingers(seeFigure),holdoneofthemeterprobestoeachendoftheresistor.

6. Whatdoyourecord?7. Usingoneoftheresistorcolorcodechart(fourbandsandfivebands)

followingcomparethevalueofwhatyoumeasuredwiththemultimeterandthecolorcodechart.(Notethatthensecondchartreallycombinesbothtypesofresistors.)

8. Areyourmeasurementswithinthecalculatedtolerance?

2

3

9. Nowtrythismeasurementagainbyputtingtheresistoronthetableandpressingtheprobetotheleads.

10. Measuretheactualresistancesforallthreeresistors:R1=R2=R3=

11. Let'stakealookatthecircuitwithresistorsinseries,shownbelow.12. WhatshouldtheresistancebetweennodesAandBequal?13. Buildthiscircuitonyourbreadboard.VerifyABresistanceviamultimeter

measurement.Whatdoyourecord?14. Snapaphotoofyourbreadboardcircuitandincludeitinyourreport.

15. Measuretheactualoutputvoltageofthe9Vbattery:16. Nowconnecta9Vbatterypercircuitbelow.Withoutmeasuringdetermine

a) HowmuchcurrentshouldflowthroughR1?b) Howmuchvoltageshouldbeacross?

17. MeasurethevoltageacrossR118. MeasurethecurrentthroughR1.Donotusethecurrentmeasuringmodeof

themultimeter.19. Snapaphotoforyourlabreport.20. Repeatsteps17)through19)forR2andR321. Sumupthevoltageforeachoftheresistorsandcommentontheresultwith

respecttostepb).22. Snapaphoto.

4

23. Buildaparallelcircuit,perdiagrambelow.24. WithoutusingthemultimetercalculateWhatshouldtheresistancebetween

AandBbe?25. Verifythisviamultimetermeasurement.Whatdoyourecord?26. Snapaphoto.

27. Nowconnecta9Vbatterypercircuitbelow.WithoutusingyourmultimetercalculatehowmuchcurrentshouldnowflowthroughR1?

28. MeasurethecurrentthroughR1.29. Measurethecurrentthroughtheothertworesistors30. Sumupthecurrentandcommentontheresult.31. Snapaphoto.

32. Let’sbuiltthefollowingcircuit.33. Repeatsteps21through23.34. Nowconnectabatteryandrepeatsteps27through31