written by Armando Pisani

The Falling Bar in a Magnetic Field model displays the non-uniform motion of a conducting bar as it slides along a vertical U
shaped wire with resistance R.  The apparatus is imbedded in a magnetic field that is B perpendicular to the plane of the bar.  The Faraday-Neumann-Lenz law for electromagnetic induction produces a motional emf and an electric current that interacts with the external field.  The motion of the bar shows that the bar's velocity exponentially approaches a terminal value.

The  Falling Bar in a Magnetic Field model was created using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double click the jar file to run the program if Java is installed.

• Download ejs_model_BarInMagneticField.jar - 1428kb Java Archive File

Published April 28, 2021
Last Modified April 28, 2021

Motion of a conducting bar in an uniform magnetic field description.

• Download Motion of a conducting bar in an uniform magnetic field.pdf - 60kb Adobe PDF Document

Last Modified April 28, 2021