1. The problem statement, all variables and given/known data A 22.0-cm-diameter coil consists of 20 turns of circular copper wire of 2.6 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 8.65 x 10-3 T/s. Determine (a) the current in the loop, and (b) the rate at which thermal energy is produced. 2. Relevant equations V = NBA / t R= pl/A l = N*2*pi*diameter of coil A = pi*(radius of wire)2 I = V/R 3. The attempt at a solution I understand the part (a)... sort of. Tell me if I did it something wrong. V = NBA / t V = (20)(8.65 x 10-3 T/s)(pi*(.0013 m)2) = 9.19 x 10-3 V R = pl/A R = (1.72 x 10-8)(20*2*pi*.22 m)/ (pi*(.0013 m)2) = 8.96 x 10-2 ohms I = V/R I = 9.19 x 10-3 V / 8.96 x 10-2 ohms = 1.03 x 10-5 A Part (b) I don't understand. I don't know what I'm finding.