A power line carrying a sinusoidally varying current with frequency = 60 Hz and peak value I = 55 kA runs at a height of 7 m across a farmer's land. The farmer constructs a vertically oriented 2 m high 10 turn rectangular wire coil below the power line. The farmer hopes to use the induced voltage in this coil to power 120 Volt electrical equipment, which requires a sinusoidally varying voltage with frequency = 60 Hz and peak value = 170 V. What should the length l of the coil be? Would this be unethical?