Question: A power line carries a sinusoidally-varying current with a peak value of I0 = 55 kA and a frequency of f = 60 Hz, suspended a height of 7.0 m above a farmer's field, as shown. Suppose the farmer builds a vertically-oriented 2.0-m-high rectangular coil with 12 turns and positions it below the power line, with the goal of using the induced voltage in the coil to power 120-V equipment that requires a 60 Hz AC voltage with a peak value of V0 = 170 V. 1. What should the length l of the coil be?