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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![Set of 15 Experiment Leads, 75 cm 1 mm², 1002840 [U13800], Experiment Leads and Cables](/thumblibrary/U13800/U13800_01_140_140_Set-of-15-Experiment-Leads-75-cm-1-mm.jpg)
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![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)
![DC Power Supply,
0 – 20 V, 0 – 5 A (115 V, 50/60 Hz), 1003311 [U33020-115], Power Supplies](/thumblibrary/U33020-115/U33020-115_01_140_140_DC-Power-Supply-0-20-V-0-5-A-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)
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![Sensor Cable, 1021514 [UCMA-BTsc1], Additional Accessories for Computer-aided Experimentation](/thumblibrary/UCMA-BTsc1/UCMA-BTsc1_01_140_140_Sensor-Cable.jpg)
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