The magnetic system shown in the figure below consists of 5444 turns of copper wire wound around a toroidal core. The wire has a resistance of 15 Ω, and the core is made from a ferromagnetic material whose reluctance is negligible compared to that of the airgaps in the system. The thickness of the entire core is uniform and is measured at 2cm. A DC voltage is applied to the coil and the resulting coil current is i=16A. The effect of fringing at the airgaps is considered to be negligible. Calculate the flux density at the lower left airgap.