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Intro Page

 Magnetic Dipole Field in 3D

The Magnetic Dipole Field Model displays the field lines and field vectors of a dipole located at the origin and oriented along the z-axis.

In Cartesian coordinates, the position vector r is ix+jy+kz and the magnetic dipole moment m vector is km.  Perform the dot product gives the following magnetic vector components:


Drag the yellow handle in the 3D view to compute the B field passing through a point (x,y,z).  Select the field option to show the field vectors in plane that passes through the dipole.


The Magnetic Dipole Field Model was developed by Wolfgang Christian using the Easy Java Simulations (EJS) modeling tool version 4.3.  You can examine and modify the model for this simulation if you have Ejs installed by right-clicking within the program and selecting "Open Ejs Model" from the pop-up menu. 


Information about EJS is available at: <> and in the OSP ComPADRE collection <>.



Code Language Translator Run

Software Requirements


Android iOS Windows MacOS
with best with Chrome Chrome Chrome Chrome
support full-screen? Yes. Chrome/Opera No. Firefox/ Samsung Internet Not yet Yes Yes
cannot work on some mobile browser that don't understand JavaScript such as.....
cannot work on Internet Explorer 9 and below



Wolfgang Christian; Wee Loo Kang; Fremont Teng

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Sample Learning Goals


For Teachers



Combo Box and Functions

Toggling the combo box will give you their respective options.


Coordinates Sliders

Adjusting the x,y,z sliders will move the object to their respective coordinates.

Toggling Full Screen

Double clicking anywhere on the screen will toggle full screen.

Play/Pause, Erase and Reset Buttons

Plays/Pauses, erases and resets the simulation respectively.
Clicking on the Erase Button will clear all the traces in the simulation.






Other Resources


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