Field angular momentum in Feynman's disk paradox

Tzu Chiang Ernest Ma

Research output: Contribution to journalLetter

4 Citations (Scopus)

Abstract

The angular momentum in static electromagnetic fields has always been a fascinating subject.1-10 Feynman's disk paradox1 is a striking example of this. In their recent article on Feynman's disk paradox, Bahder and Sak2 calculated the angular momentum in two ways, one by using Faraday's law, the other by using Lorentz force law. Although it was asserted that the angular momentum is stored in the fields, the direct approach to calculate this angular momentum from the fields has not been shown. We present this calculation so that students may understand the reason angular momentum is said to be stored in the fields.

Original languageEnglish
Pages (from-to)949-950
Number of pages2
JournalAmerican Journal of Physics
Volume54
Issue number10
DOIs
StatePublished - 1 Jan 1986

Fingerprint

paradoxes
angular momentum
Lorentz force
students
electromagnetic fields

Cite this

Ma, Tzu Chiang Ernest. / Field angular momentum in Feynman's disk paradox. In: American Journal of Physics. 1986 ; Vol. 54, No. 10. pp. 949-950.
@article{0528f4eb87064252895030a21eb16502,
title = "Field angular momentum in Feynman's disk paradox",
abstract = "The angular momentum in static electromagnetic fields has always been a fascinating subject.1-10 Feynman's disk paradox1 is a striking example of this. In their recent article on Feynman's disk paradox, Bahder and Sak2 calculated the angular momentum in two ways, one by using Faraday's law, the other by using Lorentz force law. Although it was asserted that the angular momentum is stored in the fields, the direct approach to calculate this angular momentum from the fields has not been shown. We present this calculation so that students may understand the reason angular momentum is said to be stored in the fields.",
author = "Ma, {Tzu Chiang Ernest}",
year = "1986",
month = "1",
day = "1",
doi = "10.1119/1.14801",
language = "English",
volume = "54",
pages = "949--950",
journal = "American Journal of Physics",
issn = "0002-9505",
publisher = "American Association of Physics Teachers",
number = "10",

}

Field angular momentum in Feynman's disk paradox. / Ma, Tzu Chiang Ernest.

In: American Journal of Physics, Vol. 54, No. 10, 01.01.1986, p. 949-950.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Field angular momentum in Feynman's disk paradox

AU - Ma, Tzu Chiang Ernest

PY - 1986/1/1

Y1 - 1986/1/1

N2 - The angular momentum in static electromagnetic fields has always been a fascinating subject.1-10 Feynman's disk paradox1 is a striking example of this. In their recent article on Feynman's disk paradox, Bahder and Sak2 calculated the angular momentum in two ways, one by using Faraday's law, the other by using Lorentz force law. Although it was asserted that the angular momentum is stored in the fields, the direct approach to calculate this angular momentum from the fields has not been shown. We present this calculation so that students may understand the reason angular momentum is said to be stored in the fields.

AB - The angular momentum in static electromagnetic fields has always been a fascinating subject.1-10 Feynman's disk paradox1 is a striking example of this. In their recent article on Feynman's disk paradox, Bahder and Sak2 calculated the angular momentum in two ways, one by using Faraday's law, the other by using Lorentz force law. Although it was asserted that the angular momentum is stored in the fields, the direct approach to calculate this angular momentum from the fields has not been shown. We present this calculation so that students may understand the reason angular momentum is said to be stored in the fields.

UR - http://www.scopus.com/inward/record.url?scp=3242889718&partnerID=8YFLogxK

U2 - 10.1119/1.14801

DO - 10.1119/1.14801

M3 - Letter

AN - SCOPUS:3242889718

VL - 54

SP - 949

EP - 950

JO - American Journal of Physics

JF - American Journal of Physics

SN - 0002-9505

IS - 10

ER -