Two identical, flat, circular coils of wire each have 100 turns and radius R = 0.500 m. The coils are arranged as a set of Helmholtz coils so that the separation distance between the coils is equal to the radius of the coils. Each coils carries current I = 10.0 A. Determine the magnitude of the magnetic field at a point on the common axis of the coils and halfway between them.