The article describes the results of a natural experiment to verify the mathematical model for calculating the ring magnet with a trapezoidal cross-section. Shows the graphical model of calculated the experimental magnet, as well as its real counterpart, with the measurement of the magnetic field in the center of which are compared of results of calculation of the mathematical model. Displays summary of comparative table of the results of the calculation of the mathematical model, and the measurement of real analog computation model.