Physics Practice Problems Energy Carried by Electromagnetic Waves Practice Problems Solution: An 800-kHz radio signal is detected at a point 4.5...

🤓 Based on our data, we think this question is relevant for Professor Guerrero Millan's class at Augusta State University.

Solution: An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 200 mV/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. The intensity of the radio signal at that point is closest to:A) 3.8 x 10-5 W/m2B) 5.3 x 10-5 W/m2C) 7.5 x 10-5 W/m2D) 1.1 x 10-4 W/m2E) 2.8 x 10-5 W/m2

Problem

An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 200 mV/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. The intensity of the radio signal at that point is closest to:

A) 3.8 x 10-5 W/m2

B) 5.3 x 10-5 W/m2

C) 7.5 x 10-5 W/m2

D) 1.1 x 10-4 W/m2

E) 2.8 x 10-5 W/m2