Objective: Determining the relative permittivity of various materials
Any insulating or poorly conducting material which lacks free charge carriers can act as a dielectric when an electric field passes through it. The material may be a gas, liquid or solid. The dielectric is polarised in the electric field. This polarisation can be induced (displacement) polarisation or orientational polarisation. In the experiment the voltage applied across a plate capacitor is measured both with and without cardboard or a transparent acrylic plate inserted between the capacitor’s plates. The dielectric constants of these intervening materials are obtained from the ratio of the measured voltages.
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Dielectrics in plate capacitors (115 V, 50/60 Hz), 8000785 [UE3010850-115], Electrostatics](/imagelibrary/UE3010850-115/UE3010850-115_01_Experiment-Dielectrics-in-plate-capacitors-115-V-5060-Hz.jpg)
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![Polarisation Filter on Stem, 1008668 [U22017], Photoconductivity](/thumblibrary/U22017/U22017_01_140_140_Polarisation-Filter-on-Stem.jpg)
![Universal Jaw Clamp, 1002833 [U13261], Clamp and Crocs](/thumblibrary/U13261/U13261_01_140_140_Universal-Jaw-Clamp.jpg)
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![Projection Screen, 1000608 [U17130], Options](/thumblibrary/U17130/U17130_01_140_140_Projection-Screen.jpg)
![Electron Diffraction Tube S, 1013889 [U185711], Wave–Particle-Dualism](/thumblibrary/U185711/U185711_01_140_140_Electron-Diffraction-Tube-S.jpg)
![Optical Lamp with Axial Lamp Adjustment, 1020630 [U21882], Light Sources on Stem](/thumblibrary/U21882/U21882_01_140_140_Optical-Lamp-with-Axial-Lamp-Adjustment.jpg)
![Diode Laser, 650 nm, red, 1003201 [U22000], Light Sources on Stem](/thumblibrary/U22000/U22000_01_140_140_Diode-Laser-650-nm-red.jpg)
![Laser Module, 532 nm, Green, 1003202 [U22001], Light Sources on Stem](/thumblibrary/U22001/U22001_01_140_140_Laser-Module-532-nm-Green.jpg)
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0 – 5 kV, max. 2 mA (115 V, 50/60 Hz), 1003309 [U33010-115], Power Supplies](/thumblibrary/U33010-115/U33010-115_01_140_140_High-Voltage-Power-Supply-0-5-kV-max-2-mA-115-V-5060-Hz.jpg)
![Spectrum Tube Power Supply
(115V, 50/60 Hz), 1000683 [U418001-115], Spectrum Tubes](/thumblibrary/U418001-115/U418001-115_01_140_140_Spectrum-Tube-Power-Supply-115V-5060-Hz.jpg)
![Plexiglas Plate, 1000880 [U8476371], Electrostatics](/thumblibrary/U8476371/U8476371_01_140_140_Plexiglas-Plate.jpg)
![Cardboard Plate, 1000936 [U8492341], Electrostatics](/thumblibrary/U8492341/U8492341_01_140_140_Cardboard-Plate.jpg)
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