Gianfranco SpavieriG. CavalleriG. Spinelli2026-03-222026-03-22198110.1007/bf02721330https://doi.org/10.1007/bf02721330https://andeanlibrary.org/handle/123456789/60553itPhysicsRotation (mathematics)Electric fieldTorquePerpendicularAngular momentumQuantum electrodynamicsMomentum (technical analysis)Electric potentialElectric currentImpossibility of an acyclic relativistic electric motorarticle