2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93428We define a new operator within Barnett-Pegg formalism for phase angle. The physical predictions for this operator correspond to those expected of an angular velocity operator. Examples studied are particle on a circle with and without magnetic field and quantum harmonic oscillator.4 pages, LatexQuantum Physicstext