Study multipole fields with this application. EJS Electric Multipole Model of a point charge (monopole), a dipole, or a quadrupole can show either field vectors or the scalar potential (voltage). A slider changes the charge and a movable detector shows the electric field direction and magnitude or measures the potential. Detector values can be recorded into a data table and analyzed using a built-in data analysis tool. Users can modify this simulation by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this graphing software.