Lenz's law and dimensional analysis

We show that the time it takes a magnet to fall through a nonmagnetic metallic tube may be found via dimensional analysis. The simple analysis makes this classic demonstration of Lenz's law accessible qualitatively and quantitatively to students with little knowledge of electromagnetism and onl...

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Bibliographic Details
Published in:American journal of physics 2005, Vol.73 (1), p.37-39
Main Authors: Pelesko, J. A, Cesky, M, Huertas, S
Format: Article
Language:English
Subjects:
Calculus
Dimensional analysis
Elektrodynamik
Elektromagnetische Induktion
Lenzsche Regel
Magnet
Magnetism
Physics
Physik
Spielzeugphysik
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Summary:We show that the time it takes a magnet to fall through a nonmagnetic metallic tube may be found via dimensional analysis. The simple analysis makes this classic demonstration of Lenz's law accessible qualitatively and quantitatively to students with little knowledge of electromagnetism and only elementary knowledge of calculus. The analysis provides a new example of the power and limitations of dimensional analysis. © 2005 American Association of Physics Teachers.
ISSN:0002-9505
1943-2909
DOI:10.1119/1.1773176