dorsal/arxiv
View SchemaMethods of Calculating Forces on Rigid Magnetic Media
| Authors | Kirk T. McDonald |
|---|---|
| Categories | |
| ArXiv ID | physics/0312027 |
| URL | https://arxiv.org/abs/physics/0312027 |
Abstract
Despite 180 years of theory on magnetism, it appears that the practice of calculating forces on magnetic media is ambiguous, as illustrated by a recent article by Casperson. Potentially troubling issues include: Which field B or H should be used? Should the total field be used, or only the external field? And if the latter, what is meant by "external"? Can/should effects of magnetization currents and/or fictitious magnetic poles be included? What is the force on only a portion of a circuit? We review several well-known approaches to magnetic force calculations on elements of rigid circuits, and find it very helpful to use an explicit example to compare and contrast the various methods.
{
"annotation_id": "5d59ffae-d203-4e2e-9966-04a6ecf1a8c5",
"date_created": "2026-03-02T18:00:46.023000Z",
"date_modified": "2026-03-02T18:00:46.023000Z",
"file_hash": "b9c19a2f96f16f93e1195838d337d86ae51325d20c91912c0ced5e247af0fd49",
"private": false,
"record": {
"abstract": "Despite 180 years of theory on magnetism, it appears that the practice of\ncalculating forces on magnetic media is ambiguous, as illustrated by a recent\narticle by Casperson. Potentially troubling issues include: Which field B or H\nshould be used? Should the total field be used, or only the external field? And\nif the latter, what is meant by \"external\"? Can/should effects of magnetization\ncurrents and/or fictitious magnetic poles be included? What is the force on\nonly a portion of a circuit? We review several well-known approaches to\nmagnetic force calculations on elements of rigid circuits, and find it very\nhelpful to use an explicit example to compare and contrast the various methods.",
"arxiv_id": "physics/0312027",
"authors": [
"Kirk T. McDonald"
],
"categories": [
"physics.class-ph"
],
"title": "Methods of Calculating Forces on Rigid Magnetic Media",
"url": "https://arxiv.org/abs/physics/0312027"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "1f2f1f66-35e2-4791-87a9-ae25ff4de599",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}