Suppose a 35-kW radio station emits EM waves uniformly in all directions.
(a) How much energy per second crosses a 1.0-m2 area 1.0 km from the transmitting antenna?
(b) What is the rms magnitude of the E̅ field at this point, assuming the station is operating at full power? What is the rms voltage induced in a 1.0-m-long vertical car antenna
(c) 1.0 km away,
(d) 50 km away