2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82575We study the electromagnetic properties of the nucleon and its excitations in a collective model. In the ensuing algebraic treatment all results for helicity amplitudes and form factors can be derived in closed form in the limit of a large model space. We discuss nucleon form factors and transverse electromagnetic couplings in photo- and electroproduction, including transition form factors that can be measured at new electron facilities.latex, 12 pages, 5 figures uuencoded. Invited talk at the XVIII Nuclear Physics Symposium at Oaxtepec, to be published in Revista Mexicana de FisicaNuclear TheoryHigh Energy Physics - Phenomenologytext