- Amp?re vs. Grassmann on Experimental Grounds (2010) [Updated 6 years ago]
- A Manifest Failure of Grassmann's Force (2008) [Updated 6 years ago]
- Ampere: The Avis Phoenix of Electrodynamics (2008) [Updated 6 years ago]
- A Manifest Failure of Grassmann?s Force (2008) [Updated 6 years ago]
- Action-at-a-Distance: A Key to Homopolar Induction (2007) [Updated 6 years ago]
- Inertial Mass: a Changing Entity? Weber vs. Einstein, Weber Plus Einstein or None? (2005) [Updated 1 decade ago]
- The Homopolar Motor: A True Relativistic Engine (2002) [Updated 6 years ago]

- Amp?re vs. Grassmann on Experimental Grounds (2010) [Updated 6 years ago]
The growing interest in a thorough revision of the tenets of classical electrodynamics compels the physics community to reconsider the dominating magnetic field rationale applied to electrodynamics since the time of Lorentz. The torque-production mechanism presently attributed to homopolar machines, which is based on Grassmann's force, has been definitively ruled out by recent crucial experimentation. Conversely, Ampere's force law, restating the Newtonian symmetry requirement for energy conversion, fully explains homopolar torque production.

- A Manifest Failure of Grassmann's Force (2008) [Updated 6 years ago]
The growing interest in a thorough revision of the tenets of classical electrodynamics compels us to reconsider the torque-production mechanism presently applied to homopolar machines founded - indistinctively - on Ampere's or Grassmann's basis. Recent crucial experimentation definitely rules out the latter rationale for its physical inconsistency.

- Ampere: The Avis Phoenix of Electrodynamics (2008) [Updated 6 years ago]
Recent definitive experimentation unveils on Newtonian basis- standard field theory limitations in explaining homopolar torque production.

- A Manifest Failure of Grassmann?s Force (2008) [Updated 6 years ago]
The growing interest in a thorough revision of the tenets of classical electrodynamics compels us to reconsider the torque-production mechanism presently applied to homopolar machines founded "indistinctively" on Ampere or Grassmann?s basis. Recent crucial experimentation definitively rules out the latter rationale for its physical inconsistency.

- Action-at-a-Distance: A Key to Homopolar Induction (2007) [Updated 6 years ago]
The crucial character of relative motion and Ampeers force law in interpreting homopolar induction was pointed out in recent experimentation performed by us. H. Montgomery suggests the compatibility of that experimental results with Maxwell's field theory. With the purpose of elucidating the applicable rationale this article identifies three independent energy-conversion mechanisms definable within the basic homopolar-machine frame and, hinging on a specially developed finite-element software, introduces an Amperian analysis of associated electro-and ponderomotive effects.

- Inertial Mass: a Changing Entity? Weber vs. Einstein, Weber Plus Einstein or None? (2005) [Updated 1 decade ago]
Mikhailov claims to have measured changes in the electron's inertial mass when located inside a uniformly charged spherical shell. The above mass, calculated by Assis founded on Weber's force becomes m

_{W}= m_{o}- qV/3c^{2}for a charge q placed in a region of Coulomb's potential V.In page 161 of Mikhailov states: ?So, if q and V have same (opposite) signs there is a decrease (increase) of the particle's effective mass.? Then, for q = ?e and V = k(Q/R) > 0, we get a mass increase yielding m = m

_{o}+ eV/3c^{2}> m_{o}.We remember now that also Einstein's mass-energy equivalence, m

_{E}= Energy/c^{2}, allows us to predict the electron mass-electrostatic potential dependence, of the same order of magnitude but opposite in sign. As a matter of fact, we have described the electronic mass defect taking place in the atomic electron. Let us consider an electron inside a positively charged spherical shell of charge Q, radius R producing a potential V = k(Q/R) > 0. The mutual electrostatic potential energy is ?eV < 0, so that a positive work must be supplied to carry the electron to infinite. - The Homopolar Motor: A True Relativistic Engine (2002) [Updated 6 years ago]
This article discusses experiments which enable the identification of the seat of mechanical forces in homopolar-machines reported earlier in this journal [J. Guala-Valverde and P. Mazzoni, Am. J. Phys. 63, 228-229 (1995); J. Guala-Valverde, P. Mazzoni, and K. Blas, ibid. 65, 147-148 (1997)]. We provide a suitable variation on a recent work "The Unipolar Dynamotor: A Genuine Relational Engine'' [J. Guala-Valverde and P. Mazzoni, Apeiron 8, 41-52 (2001)], where "relational'' implies "absolutely relativistic.'' Our view agrees with both Weber's recognition in the 19th century of the importance of relative motion in electromagnetic phenomena [A. K. T. Assis, Electrodynamics (Kluwer, Dordrecht, 1994)] and Einstein's 1905 statement concerning electromagnetism [Ann. Phys. 17, 891-921 (1905)].