Faraday Disk Dynamo Model

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written by Anne Cox

The EJS Faraday Disk Dynamo shows a conducting disk that rotates in a magnetic field. This produces a current (homopolar generator) and for certain configurations, it is a self-exciting dynamo. A self-exciting dynamo is the mechanical analog of a proposed mechanism to produce the earth and sun's magnetic fields. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.

The Faraday Disk Dynamo model was created using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_em_FaradayDiskDynamo.jar file will run the program if Java is installed. Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models. Additional Ejs models are available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

Please note that this resource requires at least version 1.5 of Java (JRE).

.jar

download 2328kb .jar
Last Modified: June 6, 2014
previous versions

1 source code document is available

Subjects	Levels	Resource Types
Electricity & Magnetism - Electromagnetic Induction = Induced Currents and Forces = Motors and Generators - Inductance = LR Circuits = RLC Circuits - DC - Magnetic Fields and Forces = Force on Moving Charges = Magnetic Fields	- Lower Undergraduate - Upper Undergraduate	- Instructional Material = Activity = Simulation

Intended Users	Formats	Ratings
- Learners - Educators	- application/java	Currently 5.0/5 Rated 5.0 stars by 1 person Want to rate this material? Login here!

Access Rights:: Free access
License:: This material is released under a GNU General Public License Version 3 license. Additional information is available.
Rights Holder:: Wolfgang Christian
Type:: Java Archive File
PACSs:: 01.50.hv; 07.05.Tp
Keywords:: Ejs, OSP, chaos, emf, induced current, nonlinear circuit
Record Cloner:: Metadata instance created September 3, 2009 by Anne Cox
Record Updated:: June 6, 2014 by Andreu Glasmann
Last Update when Cataloged:: September 4, 2009
Other Collections:: The Open Source Physics

any idea how to overcome this compiling error?

Author: lookang
Posted: October 23, 2009 at 6:58AM
Source: The Open Source Physics collection

D:\EasyJavaSimulation\EJS_4.2_090719\EJS_4.2\workspace\output\users\sgeducation\lookang\ejs_em_FaradayDiskDynamo\Fo_.java:542: unreachable statement
public boolean _method_for_torque_editable () { return _isPaused();; }
thanks!

» reply

Re: any idea how to overcome this compiling error?

Author: lookang
Posted: Oct 25, 2009 6:59AM UTC

using the latest version

C:\EasyJavaSimulation\EJS_4.2_091008\EJS_4.2
works now! thanks!

» reply

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ComPADRE is beta testing Citation Styles!

Record Link

<a href="https://www.compadre.org/introphys/items/detail.cfm?ID=9417">Cox, Anne. "Faraday Disk Dynamo Model." Version 1.0.</a>

AIP Format

A. Cox, Computer Program FARADAY DISK DYNAMO MODEL, Version 1.0 (2009), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313).

AJP/PRST-PER

A. Cox, Computer Program FARADAY DISK DYNAMO MODEL, Version 1.0 (2009), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313>.

APA Format

Cox, A. (2009). Faraday Disk Dynamo Model (Version 1.0) [Computer software]. Retrieved October 9, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313

Chicago Format

Cox, Anne. "Faraday Disk Dynamo Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313 (accessed 9 October 2024).

MLA Format

Cox, Anne. Faraday Disk Dynamo Model. Vers. 1.0. Computer software. 2009. Java (JRE) 1.5, Java Archive File.9 Oct. 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313>.

BibTeX Export Format

@misc{ Author = "Anne Cox", Title = {Faraday Disk Dynamo Model}, Month = {September}, Year = {2009} }

Refer Export Format

%A Anne Cox %T Faraday Disk Dynamo Model %D September 4, 2009 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313 %O 1.0 %O Java Archive File %O application/java %O Java Archive File

EndNote Export Format

%0 Computer Program %A Cox, Anne %D September 4, 2009 %T Faraday Disk Dynamo Model %7 1.0 %8 September 4, 2009 %9 Java Archive File %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9417&DocID=1313

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The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Style.org: Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

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