1. The problem statement, all variables and given/known data A 21.8 cm diameter coil consists of 18 turns of circular copper wire 1.70 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 8.15E-3 T/s. Determine the current in the loop. 2. Relevant equations V=IR V=B/T * A * N permitivity of copper= 1.72e-8 R=p * L / A' 3. The attempt at a solution V = 8.15e-3 * (.218/2)^2 * pi * 18 turns = 0.005475 V L = N * pi * coil diameter = 18 * pi * .218 = 12.32 m A'= pi * (.0017/2)^2 = 2.269e-6 m^2 R = 1.72e-8 * (12.32 m/2.269e-6 m^2) = 0.0934 ohms I = V/R = 0.005475 V / 0.0934 ohms = 0.0586 A But thats wrong... where'd I go wrong?