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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![圆筒支脚, 1002834 [U13265], 基底](/thumblibrary/U13265/U13265_01_140_140_圆筒支脚.jpg)
![带支杆的偏振过滤器, 1008668 [U22017], 位于支架上的光学组件](/thumblibrary/U22017/U22017_01_140_140_带支杆的偏振过滤器.jpg)
![直流电源 1 – 32 V / 0 – 20 A, 1012857 [U11827-230], 供电器](/thumblibrary/U11827-230/U11827-230_01_140_140_直流电源-1-32-V-0-20-A.jpg)
![一套接插线，15个，长度 75 cm, 1002840 [U13800], 电循环](/thumblibrary/U13800/U13800_01_140_140_一套接插线-15个-长度-75-cm.jpg)
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![Digital Spectrometer LD, 1018103 [U22028], 分光光度计](/thumblibrary/U22028/U22028_01_140_140_Digital-Spectrometer-LD.jpg)
![氢气光谱管, 1003409 [U41817], 光谱管和灯](/thumblibrary/U41817/U41817_01_140_140_氢气光谱管.jpg)
![Flint Glass Block for Faraday Effect, 1012860 [U8474060], 棱镜](/thumblibrary/U8474060/U8474060_01_140_140_Flint-Glass-Block-for-Faraday-Effect.jpg)
![Plexiglas Plate, 1000880 [U8476371], 静电学](/thumblibrary/U8476371/U8476371_01_140_140_Plexiglas-Plate.jpg)
![Cardboard Plate, 1000936 [U8492341], 静电学](/thumblibrary/U8492341/U8492341_01_140_140_Cardboard-Plate.jpg)
![Plate Capacitor D, 1006798 [U8492355], 静电学](/thumblibrary/U8492355/U8492355_01_140_140_Plate-Capacitor-D.jpg)
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![模拟万用表 ESCOLA 100, 1013527 [U8557380], 手持模拟测量仪器](/thumblibrary/U8557380/U8557380_01_140_140_模拟万用表-ESCOLA-100.jpg)
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![Experiment: Faraday effect (230 V, 50/60 Hz), 8000689 [UE4040600-230], Polarisation](/thumblibrary/UE4040600-230/UE4040600-230_01_140_140_Experiment-Faraday-effect-230-V-5060-Hz.jpg)
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