Energy Carried by Electromagnetic Waves Video Lessons

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Problem: An 800-kHz signal is detected at a point 7.7 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 550 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) 2.0 x 10-4 W/m2 B) 5.7 x 10-4 W/m2 C) 8.0 x 10-4 W/m2 D) 2.8 x 10-4 W/m2 E) 4.0 x 10-4 W/m2

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Problem Details

An 800-kHz signal is detected at a point 7.7 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 550 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) 2.0 x 10-4 W/m2

B) 5.7 x 10-4 W/m2

C) 8.0 x 10-4 W/m2

D) 2.8 x 10-4 W/m2

E) 4.0 x 10-4 W/m2

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Energy Carried by Electromagnetic Waves concept. You can view video lessons to learn Energy Carried by Electromagnetic Waves. Or if you need more Energy Carried by Electromagnetic Waves practice, you can also practice Energy Carried by Electromagnetic Waves practice problems.

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Based on our data, we think this problem is relevant for Professor Almukahhal's class at UNLV.