A Radio Transmitter Is Operating at an Average Power Of 4.00

question 125

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) 4.97 μW/m²
• B) 2.49 μW/m²
• C) 0.00497 W/m²
• D) 0.00249 W/m²

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Definitions:

Inversely

In an opposite or reverse manner, often referring to the relationship where as one variable increases, another decreases.

Fifth Power

A number or variable raised to the exponent of five, indicating it is multiplied by itself four times.

Hooke's Law

A principle stating that the force needed to extend or compress a spring by some distance is proportional to that distance.

Average Speed

The total distance traveled divided by the total time taken, reflecting a constant rate of movement over a specific interval.