The Point Charge Electric Field in 1D model investigates the electric field at various positions along a line, when there are either one or two charged particles on that line. The electric field is represented in two ways. First, there is a movable positive test charge that you can move along the line to sample the field at various locations - the direction of the force on that test charge is the same as the direction of the electric force on the test charge.
The second way to represent the electric field is to plot a graph of the electric field as a function of position. For the graph, we define positive field as a field pointing to the right, and negative field as a field pointing to the left.
Point Charge Electric Field in 1D Worksheet
A student worksheet for the Point Charge Electric Field 1D model. download 8kb .pdf
Last Modified: June 20, 2010
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Point Charge Electric Field in 1D Source Code
Source Code for the Point Charge Electric Field in 1D model. The source code zip archive contains an XML representation of the model. Unzip this archive in… more... download 5kb .zip
Last Modified: June 20, 2010
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)
4. THE PHYSICAL SETTING
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.
11. COMMON THEMES
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.
A. Duffy, Computer Program POINT CHARGE ELECTRIC FIELD IN 1D MODEL (2008), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574).
A. Duffy, Computer Program POINT CHARGE ELECTRIC FIELD IN 1D MODEL (2008), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574>.
Duffy, A. (2008). Point Charge Electric Field in 1D Model [Computer software]. Retrieved May 25, 2013, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574
Duffy, Andrew. "Point Charge Electric Field in 1D Model." http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574 (accessed 25 May 2013).
Duffy, Andrew. Point Charge Electric Field in 1D Model. Computer software. 2008. 25 May 2013 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574>.
%A Andrew Duffy %T Point Charge Electric Field in 1D Model %D August 27, 2009 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574 %O application/java
%0 Computer Program %A Duffy, Andrew %D August 27, 2009 %T Point Charge Electric Field in 1D Model %8 August 27, 2009 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=9411&DocID=1574
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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.
1st remix made Ejs Open Source Electric Field & Potential of 2 Charged Particles Java Applet by lookang. a remix of this original model by Professor Andrew Duffy. customized it for sg syllabus
2nd new remix is born! Re-purposed into Ejs Open Source Gravitational Field & Potential of 2 Mass Java Applet by lookang. Many thanks to Professor Andrew Duffy for his original codes, to Professor Fu-Kwun Hwang for his forum and community of learners & to Professor Paco for creating Ejs toolkit and Professor Wolfgang for OSP codes.
3rd remix probably final one, authentic case study of a exam question scenario Ejs Open Source Gravitational Field & Potential of Earth and Moon Java Applet by lookang. based on Real Data! customized by lookang based on an applet by Professor Andrew Duffy. many thanks for allowing people to learn from your codes. OSP guys and gals are heroes in physics education :)
This applet even has activities / exercises to promote student to notice, think about the physics examined illustrated :)
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