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Point Charge Forces in 1D Model
written by Andrew Duffy
The Point Charge Forces in One-Dimension model investigates the electric force that one charged particle exerts on another.  The electric force is shown in three ways. First, particle 2 can be dragged left or right to sample the force at various locations - the force on each particle is shown with an arrow. Second, the numerical value of each force is shown in the table at the bottom. Third, you can check the box at the top of the menu to plot a graph of the electric force as a function of position. For the graph (and the numerical values), we define positive force as a force pointing to the right, and negative force as a force pointing to the left.

The Point Charge Forces in One-Dimension 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_bu_Point_Charge_Force_1D.jar file will run the program if Java is installed.

Please note that this resource requires at least version 1.5 of Java (JRE).
1 source code document is available
Subjects Levels Resource Types
Electricity & Magnetism
- Electric Fields and Potential
= Electric Field
- Electrostatics
= Coulomb's Law
- Lower Undergraduate
- High School
- Upper Undergraduate
- Instructional Material
= Interactive Simulation
- Audio/Visual
= Movie/Animation
Intended Users Formats Ratings
- Learners
- Educators
- application/java
  • Currently 0.0/5

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Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Andrew Duffy, Boston University
Java Archive File
EJS, Easy Java Simulation, Open Source Physics, charge, charge particles, coulomb's law, electric, electric field, electric force, electrostatics model, electrostatics simulation, field, interactive simulation
Record Cloner:
Metadata instance created April 16, 2010 by Wolfgang Christian
Record Updated:
June 11, 2014 by Andreu Glasmann
Last Update
when Cataloged:
April 16, 2010
Other Collections:

AAAS Benchmark Alignments (2008 Version)

11. Common Themes

11B. Models
  • 6-8: 11B/M1. Models are often used to think about processes that happen too slowly, too quickly, or on too small a scale to observe directly. They are also used for processes that are too vast, too complex, or too dangerous to study.

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.
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Record Link
AIP Format
A. Duffy, Computer Program POINT CHARGE FORCES IN 1D MODEL (2010), WWW Document, (
A. Duffy, Computer Program POINT CHARGE FORCES IN 1D MODEL (2010), <>.
APA Format
Duffy, A. (2010). Point Charge Forces in 1D Model [Computer software]. Retrieved July 29, 2016, from
Chicago Format
Duffy, Andrew. "Point Charge Forces in 1D Model." (accessed 29 July 2016).
MLA Format
Duffy, Andrew. Point Charge Forces in 1D Model. Computer software. 2010. Java (JRE) 1.5, Java Archive File.29 July 2016 <>.
BibTeX Export Format
@misc{ Author = "Andrew Duffy", Title = {Point Charge Forces in 1D Model}, Month = {April}, Year = {2010} }
Refer Export Format

%A Andrew Duffy
%T Point Charge Forces in 1D Model
%D April 16, 2010
%O Java Archive File
%O application/java
%O Java Archive File

EndNote Export Format

%0 Computer Program
%A Duffy, Andrew
%D April 16, 2010
%T Point Charge Forces in 1D Model
%8 April 16, 2010
%9 Java Archive File

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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 Electronic References.

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Point Charge Forces in 1D 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 Chrage Forces in 1D Model.

relation by Wolfgang Christian

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