PA seen by the observer (χ) obtained for the angle η = 20°, for different radii, observer inclinations, and magnetic fields, as a function of the azimuth in the disk. The upper panels show the case of the radial field, the middle panels correspond to the purely toroidal field, and the lower panels correspond to the vertical field. The columns correspond, from left to right, to an increasing observer inclination: i = 30°, 60°, and 80°. The matter is assumed to rotate counterclockwise (σ = 90°), with a velocity following Luminet’s law.