Uniform magnetic field analysis made easy. EJS Falling Loop Model shows a conducting loop falling out of a region of uniform magnetic field. It plots the velocity of the loop as a function of time. Users can change the size and orientation of the loop as well as the extent and location of the uniform field. If Ejs is installed, right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item allows for editing of the model.

Run the simulation. The arrows show the uniform magnetic field. A conducting loop falls under the influence of gravity, but it also experiences a force as it goes from a region of no magnetic field to a constant magnetic field. What is causing this upward force? (Hint: There is an induced current in the loop. Why? This means there is a magnetic force in what direction(s) on the side(s) of the loop?)
Move the loop up and the field down so that the loop falls freely before entering the field. Describe your observations of the loop and the velocity versus time plot.

Requirements:
* Java

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