5C20.10  CAPACITOR WITH DIELECTRICS



  • Version 1
  • A capacitance meter shows the change in capacitance of a parallel plate capacitor as various dielectric materials are inserted between the plates.
  • Best results are obtained with a tight fit between plates and dielectric.
  • Be careful not to get stray charge on dielectrics since it can affect results.
  • Lay meter on document camera or use a video camera to project meter display.


  • Version 2
  • An electroscope shows the change in voltage as various dielectric materials are inserted between the plates.
  • A high voltage supply is used to charge the plates when they are close together. Then spread the plates apart to get a greater deflection of the electroscope needle.
        (use Pasco HV supply)
        (explain method for moving cables from supply to electroscope)


  • Version 3
  • An electrostatic voltmeter shows the change in voltage as various dielectric materials are inserted between the plates.
  • Charge the fixed plate only.
  • A video camera may be needed in a large classroom.




         (show proper charging technique)

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