1. You are given a coil, and you measure its inductance: L = 17.9 H. You must replace the winding with a thicker wire, and only 8 turns can fit in the length of the core. The wire has a maximum current rating of 11A. The core material has a relative permeability r = 2680. You measure the total core cross-sectional area and find it to be Am = 1.9110-5. This coil should be used to generate the magnetic field of a motor. The motor armature will induce enough voltage only if the magnetic field is more than 1 T. Determine the length of the coil, and if it will generate a strong enough magnetic field.