Electromagnetic braking revisited with a magnetic point dipole model


Journal Article

© 2016 American Association of Physics Teachers. A theoretical model is developed to predict the trajectory of magnetized spheres falling through a copper pipe. The derive magnetic point dipole model agrees well with the experimental trajectories for NdFeB spherical magnets of varying diameter, which are embedded inside 3D printed shells with fixed outer dimensions. This demonstration of electrodynamic phenomena and Lenz's law serves as a good laboratory exercise for physics, electromagnetics, and dynamics classes at the undergraduate level.

Full Text

Duke Authors

Cited Authors

  • Land, S; McGuire, P; Bumb, N; Mann, BP; Yellena, BB

Published Date

  • April 1, 2016

Published In

Volume / Issue

  • 84 / 4

Start / End Page

  • 257 - 262

Electronic International Standard Serial Number (EISSN)

  • 1943-2909

International Standard Serial Number (ISSN)

  • 0002-9505

Digital Object Identifier (DOI)

  • 10.1119/1.4941099

Citation Source

  • Scopus