On Magnetic Forces and Work

Foundations of Physics 51 (4):1-17 (2021)
Download Edit this record How to cite View on PhilPapers
Abstract
We address a long-standing debate over whether classical magnetic forces can do work, ultimately answering the question in the affirmative. In detail, we couple a classical particle with intrinsic spin and elementary dipole moments to the electromagnetic field, derive the appropriate generalization of the Lorentz force law, show that the particle’s dipole moments must be collinear with its spin axis, and argue that the magnetic field does mechanical work on the particle’s elementary magnetic dipole moment. As consistency checks, we calculate the overall system’s energy-momentum and angular momentum, and show that their local conservation equations lead to the same force law and therefore the same conclusions about magnetic forces and work. We also compute the system’s Belinfante–Rosenfeld energy–momentum tensor.
ISBN(s)
PhilPapers/Archive ID
BAROMF-3
Upload history
Archival date: 2020-09-07
View other versions
Added to PP index
2020-09-07

Total views
78 ( #51,638 of 65,772 )

Recent downloads (6 months)
28 ( #28,504 of 65,772 )

How can I increase my downloads?

Downloads since first upload
This graph includes both downloads from PhilArchive and clicks on external links on PhilPapers.