Question 14 of 21 > Using the figure shown, derive an expression for the magnitude of the magnetic field Bc at the point C located at the center of the two circular, current-carrying arcs and the connecting radial lines. Assume the radii of the small and large arcs are r and r, respectively. Your expression may contain the current i, the two radii r and r2, the permeability of free space o, and numerical constants. Macmillan Learning a Bc = I Q Rechercher hp C 112 f11 insert 22:09 23/07/2023 prt sc