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Falling Bar in a B Field Model Documents

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Main Document

Falling Bar in a B Field Model 

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.

Published April 28, 2021
Last Modified April 28, 2021

Supplemental Documents

Falling Bar in a B Field Description 

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

Last Modified April 28, 2021

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