A Radio Transmitter Is Operating at an Average Power Of 4.00

question 3

Multiple Choice

A radio transmitter is operating at an average power of $4.00 \mathrm {~kW}$ and is radiating uniformly in all directions. What is the average intensity of the signal $8.00 \mathrm {~km}$ from the transmitter?

• A) \(2.49 \mu \mathrm { W } / \mathrm { m } ^ { 2 }\)
• B) \(0.00497 \mathrm {~W} / \mathrm { m } ^ { 2 }\)
• C) \(0.00249 \mathrm {~W} / \mathrm { m } ^ { 2 }\)
• D) \(4.97 \mu \mathrm { W } / \mathrm { m } ^ { 2 }\)

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