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The Open Source Physics Project is supported by NSF DUE-0442581.

Computer Program Detail Page

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Point Charge Electric Field Demo Model
written by Wolfgang Christian
The Point Charge Electric Field Demo model shows the electric field with multiple point charge configurations and vector field visualizations.  Users can select these configurations from a drop down menu or can create their own configurations.

The Point Charge Electric Field Demo model was created using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double click the ejs_em_PointChargeElectricFieldDemo.jar file to run the program if Java is installed.

Please note that this resource requires at least version 1.5 of Java.
3 supplemental documents are available
1 source code document is available
Subjects Levels Resource Types
Electricity & Magnetism
- Electric Fields and Potential
= Electric Field
- Lower Undergraduate
- Middle School
- High School
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Educators
- application/java
  • Currently 5.0/5

Rated 5.0 stars by 1 person

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Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license. Additional information is available.
Rights Holder:
Wolfgang Christian
Record Cloner:
Metadata instance created August 11, 2010 by Wolfgang Christian
Record Updated:
June 11, 2014 by Andreu Glasmann
Last Update
when Cataloged:
September 1, 2009

If Field Lines can be added, it would a great visualization tool

Author: lookang
Posted: August 21, 2010 at 11:26PM

i have always been very impressed by Physlets Electric field lines java applet
the field lines is a concept continued to be explained in textbooks instead of the easily field vectors which is a common visualization in physics Ejs model.

chance to reproduce the field lines in this Ejs model? i believe it will be a great visualization tool.

» reply

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AAAS Benchmark Alignments (2008 Version)

4. The Physical Setting

4G. Forces of Nature
  • 3-5: 4G/E3. Without touching them, an object that has been electrically charged pulls on all other uncharged objects and may either push or pull other charged objects.

AAAS Benchmark Alignments (1993 Version)


G. Forces of Nature
  • 4G (9-12) #3.  There are two kinds of charges?positive and negative. Like charges repel one another, opposite charges attract. In materials, there are almost exactly equal proportions of positive and negative charges, making the materials as a whole electrically neutral. Negative charges, being associated with electrons, are far more mobile in materials than positive charges are. A very small excess or deficit of negative charges in a material produces noticeable electric forces.

NSES Content Standards

Con.B: Physical Science
  • K-4: Light, Heat, Electricity, Magnetism
  • 5-8: Motion & Forces
  • 9-12: Interactions of Energy & Matter
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian, Computer Program POINT CHARGE ELECTRIC FIELD DEMO MODEL, Version 1.0 (2010), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799).
W. Christian, Computer Program POINT CHARGE ELECTRIC FIELD DEMO MODEL, Version 1.0 (2010), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799>.
APA Format
Christian, W. (2010). Point Charge Electric Field Demo Model (Version 1.0) [Computer software]. Retrieved June 24, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799
Chicago Format
Christian, Wolfgang. "Point Charge Electric Field Demo Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799 (accessed 24 June 2024).
MLA Format
Christian, Wolfgang. Point Charge Electric Field Demo Model. Vers. 1.0. Computer software. 2010. Java 1.5. 24 June 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian", Title = {Point Charge Electric Field Demo Model}, Month = {September}, Year = {2009} }
Refer Export Format

%A Wolfgang Christian %T Point Charge Electric Field Demo Model %D September 1, 2009 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799 %O 1.0 %O application/java

EndNote Export Format

%0 Computer Program %A Christian, Wolfgang %D September 1, 2009 %T Point Charge Electric Field Demo Model %7 1.0 %8 September 1, 2009 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=10312&DocID=1799

Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

Citation Source Information

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.

This resource is stored in 3 shared folders.

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Point Charge Electric Field Demo Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Point Charge Electric Field Demo Model.

relation by Wolfgang Christian
Is a Teaching Guide For Physics Classroom: Electric Field Lines
Is the Basis For 2D Charge Particles Model by Wolfgang Christian

changes made:
redesign the panel for control to be bottom
added more options to the menu for ease of use
made the drawing of charges proportional to the charges
made the collision detection to pause when the test charge is inside the charges
added evolution page to reflect the physics of motion
added test mass, m = 1 kg
added trail to show path of test charge that can be drag away and it will start from vx=vy=0

relation by wee lookang

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