An Experimental Study on Unipolar Induction

Chen, K.; Li, X. J.; Hui, Yan

doi:10.12693/aphyspola.131.271

Cited by 5 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lorentz did not comment on the works of Thomson and Heaviside, and arrived at the magnetic part of this expression from Grassmann's force, substituting qv for Ids, although he did not mention Grassmann's work as well ... Lorentz did not specify in (34) what is the object, medium or system relative to which the velocity v of the charge q is to be understood. As Lorentz still accepted Maxwell's ether ..., it is natural to suppose that for him this was the velocity of the charge q relative to this ether, and not relative to any other medium or observer.…”

Section: Force Laws: Maxwell Lorentz Weber Ritzmentioning

confidence: 99%

See 1 more Smart Citation

Evidence for Maxwell’s equations, fields, force laws and alternative theories of classical electrodynamics

Tran

2018

Eur. J. Phys.

View full text Add to dashboard Cite

The set of equations known today as Maxwell's equations along with a few constitutive equations lie at the heart of classical electromagnetism. A common misconception held by many is that Maxwell equations are essential, and that classical electromagnetic theory is settled science and is no longer an active field of investigations. We will review the four Maxwell's equations and related equations, their supporting experimental evidence, the field concept, and the Lorentz and Ritz force laws. We will give a brief outline of two approaches to classical electromagnetism which bypass Maxwell's equations, the propagated potential approach and the direct action approach which bypasses even the field concept. We will also give a few indications of some current research being done in comparing the fitness of the Lorentz and Ritz force laws, and point out some area of researches yet to be explored concerning the direct action approach to classical electromagnetism using the Ritz force formula.

show abstract

Section: Force Laws: Maxwell Lorentz Weber Ritzmentioning

confidence: 99%

“…These experiments often fall under the label 'unipolar induction', with some arguing that the field rotates and others that it does not. Two recent experimental papers provide a brief history of this 200-year-old question and indicate that the field does not rotate [34,35].…”

Section: Faraday Induction Lawmentioning

confidence: 99%

Evidence for Maxwell’s equations, fields, force laws and alternative theories of classical electrodynamics

Tran

2018

Eur. J. Phys.

View full text Add to dashboard Cite

show abstract

“…Since Faraday's discovery [1], unipolar induction has been a controversial phenomenon in electrodynamic theory that is described as paradoxical with competing theories and explanations suggested. To this day, no clear consensus has been reached [2][3][4][5][6][7][8][9], and it remains an interesting topic for debate [4][5][6][7][8]. A general setup of a so-called Faraday-generator is shown in Figure 1, consisting of a cylindrical bar magnet and a conducting disk, across which the induced voltage is measured.…”

Section: Introductionmentioning

confidence: 99%

A Novel Model of Unipolar Induction Phenomena Based on Direct Interaction Between Conductor Charges

Baumgärtel¹,

Smith²,

Maher³

2021

PIER

View full text Add to dashboard Cite

Unipolar induction has been a heavily discussed phenomenon in the realm of electrodynamics, with research and experiments proposing and supporting different ways to explain the observed effects. This paper presents a novel model to predict induced electromotive forces in a Faraday generator, based on direct interaction between conductor charges. It is compared with predictions that are usually obtained through considerations of Lorentz force, flux linking or flux cutting rules. A standard apparatus provides additional experimental measurements that show good agreement with the theory.

show abstract

Resolving the paradox of unipolar induction: new experimental evidence on the influence of the test circuit

Baumgärtel

Maher

2022

Sci Rep

View full text Add to dashboard Cite

A novel experiment has been devised shedding new light on the phenomenon of unipolar induction, also known as “Faraday’s Paradox”. This is a topic which continues to fascinate scientists and engineers with much debate continuing to this day. In particular, the question of the field co-rotating with the magnet or remaining stationary remains unsettled and supporting evidence exists for both positions. In this study, we present a novel experimental apparatus that includes, for the first time, the relative motion of the measurement circuit including the closing wires, as well as the magnet and disc respectively. The results show that the closing wire needs to be considered as part of the problem, which enables the apparent paradox associated with this phenomenon to be resolved. However, it remains impossible to tell if the field co-rotates with the magnet or if it remains stationary. Instead, direct electron interaction is considered as a viable alternative to resolve remaining paradoxes.

show abstract

An Experimental Study on Unipolar Induction

Cited by 5 publications

References 16 publications

Evidence for Maxwell’s equations, fields, force laws and alternative theories of classical electrodynamics

Evidence for Maxwell’s equations, fields, force laws and alternative theories of classical electrodynamics

A Novel Model of Unipolar Induction Phenomena Based on Direct Interaction Between Conductor Charges

Resolving the paradox of unipolar induction: new experimental evidence on the influence of the test circuit

Contact Info

Product

Resources

About