cdlpayne6607 cdlpayne6607 13-05-2023 Physics contestada The magnitude of the magnetic field at point P, at the center of the semicircle shown, is given by: 2 mu_0 i/R^2 mu_0 i/2 pi R mu_0 i/4 pi R mu_0 i/2R mu_0 i/4R. 12.