CCAST World Lab, Beijing 100080, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
We employ point form relativistic quantum mechanics to calculate the photoproduction and electroproduction of nucleon resonances. Both the transverse and longitudinal transition amplitudes are computed based on the constituent quark model within the relativistic framework. The obtained results are compared with the calculations of the nonrelativistic approach and of the hypercentral potential model. Relativistic effects and discrepancies among the models are discussed.