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Point Charge Electric Field in 1D Model
written by Andrew Duffy
In this simulation, students investigate the electric field at various points along a line. They can activate one or two charged particles and set the charge from -30 to 30 nC.  A graph showing the electric field as a function of position may be viewed or hidden. Net electric field is calculated at the bottom of the screen.  

This applet was created with EJS, Easy Java Simulations, a modeling tool that allows users without formal programming experience to generate computer models and simulations.

SEE RELATED ITEMS on this page for a link to the full index of Andrew Duffy's EJS simulations.
1 supplemental document is available
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
- Middle School
- Upper Undergraduate
- Instructional Material
= Interactive Simulation
- Audio/Visual
= Movie/Animation
Intended Users Formats Ratings
- Learners
- Educators
- application/java
  • Currently 5.0/5

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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
EJS, Easy Java Simulation, charge, charge particles, coulomb's law, electric, electric field, electric field simulation, field
Record Cloner:
Metadata instance created September 2, 2009 by Elijah Lee
Record Updated:
June 13, 2014 by Andreu Glasmann
Last Update
when Cataloged:
August 27, 2009
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.
  • 4G (9-12) #4.  Different kinds of materials respond differently to electric forces. In conducting materials such as metals, electric charges flow easily, whereas in insulating materials such as glass, they can move hardly at all. At very low temperatures, some materials become superconductors and offer no resistance to the flow of current. In between these extremes, semiconducting materials differ greatly in how well they conduct, depending on their exact composition.


B. Models
  • 11B (9-12) #1.  The basic idea of mathematical modeling is to find a mathematical relationship that behaves in the same ways as the objects or processes under investigation. A mathematical model may give insight about how something really works or may fit observations very well without any intuitive meaning.

NSES Content Standards

Con.B: Physical Science
  • 9-12: Motions & Forces
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Record Link
AIP Format
A. Duffy, Computer Program POINT CHARGE ELECTRIC FIELD IN 1D MODEL (2008), WWW Document, (
A. Duffy, Computer Program POINT CHARGE ELECTRIC FIELD IN 1D MODEL (2008), <>.
APA Format
Duffy, A. (2008). Point Charge Electric Field in 1D Model [Computer software]. Retrieved October 24, 2017, from
Chicago Format
Duffy, Andrew. "Point Charge Electric Field in 1D Model." (accessed 24 October 2017).
MLA Format
Duffy, Andrew. Point Charge Electric Field in 1D Model. Computer software. 2008. 24 Oct. 2017 <>.
BibTeX Export Format
@misc{ Author = "Andrew Duffy", Title = {Point Charge Electric Field in 1D Model}, Month = {August}, Year = {2009} }
Refer Export Format

%A Andrew Duffy
%T Point Charge Electric Field in 1D Model
%D August 27, 2009
%O application/java

EndNote Export Format

%0 Computer Program
%A Duffy, Andrew
%D August 27, 2009
%T Point Charge Electric Field in 1D Model
%8 August 27, 2009

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

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Point Charge Electric Field 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 Boston University Physics Easy Java Simulation: Electric Field in 1D.

relation by Wolfgang Christian

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