Assume that a single high-voltage 60 Hz power line carries a current of 500 Amperes and has its center located 12 meters above the ground.
(a) Model the line as an infinite filament of current under dc conditions. Calculate the magnetic field intensity in amperes/meter at the top of the head of a man who is 2 meters tall. Assume the man is standing on the ground directly underneath the line. Include a figure to express the geometry used to obtain your answer.
(b) What is the magnetic flux density in units of Tesla, corresponding to the intensity in part (a)?
(c) Calculate the wavelength in miles of a 60 Hz signal in free space.
(d) Is the dc assumption used in part (a) reasonable? Explain.