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.
![Experiment: 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)
![Optical rider D , 90/50, 1002635 [U103111], Optics with an Optical Bench](/thumblibrary/U103111/U103111_01_140_140_Optical-rider-D-9050.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Polarisation Filter on Stem, 1008668 [U22017], Optical Components on Stem](/thumblibrary/U22017/U22017_01_140_140_Polarisation-Filter-on-Stem.jpg)
![Optical Precision Bench D, 500 mm, 1002630 [U10302], Optics with an Optical Bench](/thumblibrary/U10302/U10302_01_140_140_Optical-Precision-Bench-D-500-mm.jpg)
![Optical Base D, 1009733 [U10319], Optics with an Optical Bench](/thumblibrary/U10319/U10319_01_140_140_Optical-Base-D.jpg)
![Universal Jaw Clamp, 1002833 [U13261], Clamp and Crocs](/thumblibrary/U13261/U13261_01_140_140_Universal-Jaw-Clamp.jpg)
![Set of 15 Experiment Leads, 75 cm 1 mm², 1002840 [U13800], Circuits](/thumblibrary/U13800/U13800_01_140_140_Set-of-15-Experiment-Leads-75-cm-1-mm.jpg)
![Tube Holder S -
for the experimental setup of tubes of series S, 1014525 [U185002], Electron Tubes S](/thumblibrary/U185002/U185002_01_140_140_Tube-Holder-S-for-the-experimental-setup-of-tubes-of-series-S.jpg)
![Optical LED Lamp, 1020630 [U21882], Optical Lamps on Stem](/thumblibrary/U21882/U21882_01_140_140_Optical-LED-Lamp.jpg)
![Red Laser Diode, 650 nm, 1003201 [U22000], Optical Lamps on Stem](/thumblibrary/U22000/U22000_01_140_140_Red-Laser-Diode-650-nm.jpg)
![Laser Module, Green, 1003202 [U22001], Optical Lamps on Stem](/thumblibrary/U22001/U22001_01_140_140_Laser-Module-Green.jpg)
![High Voltage Power Supply 5 kV (115 V, 50/60 Hz), 1003309 [U33010-115], Power Supplies](/thumblibrary/U33010-115/U33010-115_01_140_140_High-Voltage-Power-Supply-5-kV-115-V-5060-Hz.jpg)
![Spectrum Tube Power Supply (115V, 50/60 Hz), 1000683 [U418001-115], Spectrum Tubes and Spectrum Lamps](/thumblibrary/U418001-115/U418001-115_01_140_140_Spectrum-Tube-Power-Supply-115V-5060-Hz.jpg)
![Spectrum Tube Hydrogen, 1003409 [U41817], Spectrum Tubes and Spectrum Lamps](/thumblibrary/U41817/U41817_01_140_140_Spectrum-Tube-Hydrogen.jpg)
![Plate Capacitor D, 1006798 [U8492355], Electrostatics](/thumblibrary/U8492355/U8492355_01_140_140_Plate-Capacitor-D.jpg)
![U-core D, 1000976 [U8497180], Demountable Transformer D](/thumblibrary/U8497180/U8497180_01_140_140_U-core-D.jpg)
![Coil D, 900 Turns, 1012859 [U8497390], Demountable Transformer D](/thumblibrary/U8497390/U8497390_01_140_140_Coil-D-900-Turns.jpg)
![Sensor Cable, 1021514 [UCMA-BTsc1], Additional Accessories for Computer-aided Experimentation](/thumblibrary/UCMA-BTsc1/UCMA-BTsc1_01_140_140_Sensor-Cable.jpg)
![Experiment: Malus’ Law , 8000687 [UE4040100-230], Polarisation](/thumblibrary/UE4040100-230/UE4040100-230_01_140_140_Experiment-Malus-Law.jpg)
![Experiment: Electron Diffraction (115 V, 50/60 Hz), 8000703 [UE5010500-115], Fundamentals of Atomic Physics](/thumblibrary/UE5010500-115/UE5010500-115_01_140_140_Experiment-Electron-Diffraction-115-V-5060-Hz.jpg)