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Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening
written by Jake S. Bobowski and Jaklyn De Vos
An experiment that investigates the transition from conductive to dielectric screening of electric fields by a tube of water has been designed for senior physics undergraduates. A parallel-plate capacitor is used to generate a uniform electric field. Two concentric acrylic plexiglass tubes pass perpendicularly through the electric field generated between the plates. The region between the tubes can be filled with air or water. An electrode, suspended within the inner plexiglass tube, is used to sense the electric potential at its location. The sensor is designed so that it can be rotated to measure the potential at a second symmetric position. From the difference in the two potentials, the frequency dependence of the magnitude and phase of the electric field can be determined. With deionized water between the tubes, the magnitude and phase of the interior electric field was measured from 100 Hz to 300 kHz. The high-pass filter frequency response expected for a dielectric tube with non-negligible conductivity was observed. Fits to the data yielded a very reasonable experimental value for the ratio of the water's conductivity to its dielectric constant.
2015 Conference on Laboratory Instruction Beyond the First Year of College
Part of the BFY Conference series
College Park, MD: July 22-24, 2015
Pages 16-19
Subjects Levels Resource Types
Education Practices
- Curriculum Development
= Laboratory
Electricity & Magnetism
- Capacitance
= Dielectric
- Electric Fields and Potential
= Electric Field
- Upper Undergraduate
- Instructional Material
= Laboratory
- Reference Material
= Article
Material Category Formats Ratings
- Articles and Supplements
- application/pdf
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Format:
application/pdf
Mirror:
http://dx.doi.org/10.1119/bfy.201…
Access Rights:
Free access
License:
This material is released under a Creative Commons Attribution 3.0 license. Further distribution of this work must maintain attribution to the published article's author(s), title, proceedings citation, and DOI.
Rights Holder:
American Association of Physics Teachers
DOI:
10.1119/bfy.2015.pr.004
PACSs:
01.50.Pa
07.50.Hp
77.22.-d
Keywords:
BFY 2015, Conductivity, Dielectric, Electromagnetics, Lock-in detection, Screening, Voltage sensor
Record Cloner:
Metadata instance created November 17, 2015 by Lyle Barbato
Record Updated:
November 19, 2015 by Bruce Mason
Last Update
when Cataloged:
November 17, 2015
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Record Link
AIP Format
J. Bobowski and J. De Vos, presented at the 2015 Conference on Laboratory Instruction Beyond the First Year of College, College Park, MD, 2015, WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216).
AJP/PRST-PER
J. Bobowski and J. De Vos, Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening, presented at the 2015 Conference on Laboratory Instruction Beyond the First Year of College, College Park, MD, 2015, <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216>.
APA Format
Bobowski, J., & De Vos, J. (2015, July 22-24). Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening. Paper presented at 2015 Conference on Laboratory Instruction Beyond the First Year of College, College Park, MD. Retrieved December 18, 2017, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216
Chicago Format
Bobowski, Jake, and Jaklyn De Vos. "Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening." Paper presented at the 2015 Conference on Laboratory Instruction Beyond the First Year of College, College Park, MD, July 22-24, 2015. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216 (accessed 18 December 2017).
MLA Format
Bobowski, Jake, and Jaklyn De Vos. "Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening." 2015 Conference on Laboratory Instruction Beyond the First Year of College. College Park, MD: 2015. 16-19 of BFY Conference. 18 Dec. 2017 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216>.
BibTeX Export Format
@inproceedings{ Author = "Jake Bobowski and Jaklyn De Vos", Title = {Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening}, BookTitle = {2015 Conference on Laboratory Instruction Beyond the First Year of College}, Pages = {16-19}, Address = {College Park, MD}, Series = {BFY Conference}, Month = {July 22-24}, Year = {2015} }
Refer Export Format

%A Jake Bobowski
%A Jaklyn De Vos
%T Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening
%S BFY Conference
%D July 22-24 2015
%P 16-19
%C College Park, MD
%U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216
%O 2015 Conference on Laboratory Instruction Beyond the First Year of College
%O July 22-24
%O application/pdf

EndNote Export Format

%0 Conference Proceedings
%A Bobowski, Jake
%A De Vos, Jaklyn
%D July 22-24 2015
%T Screening Electric Fields using a Tube of Water: The Transition from Conductive to Dielectric Screening
%B 2015 Conference on Laboratory Instruction Beyond the First Year of College
%C College Park, MD
%P 16-19
%S BFY Conference
%8 July 22-24
%U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13796&DocID=4216


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