A toroid of rectangular cross section has height h = 0.01384 m, inner radius r1 = 0.02018 m and outer radius r2 = 0.06768 m. If it has N = 216 loops, calculate the total flux of the magnetic field through one of the loops if the current is i = 3.13 A. Hint: you can use the fact that the inductance of the toroid is L = μ0N2h 2πln(r2 r1). Wb