Field Intensity: an 800-KHz Radio Signal Is Detected at a Point

question 33

Multiple Choice

Field intensity: An 800-kHz radio signal is detected at a point 9.1 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 0.440 V/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. What is the average total power radiated by the transmitter? (c = 3.00 × 10⁸ m/s, μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A) 0.27 MW
• B) 0.32 MW
• C) 0.38 MW
• D) 0.45 MW
• E) 0.50 MW

Gain an understanding of scientific attitudes and their importance in scientific inquiry.

Recognize the importance and methods of ensuring a sample is representative of a population.

Understand the distinction between hypotheses and theories and their roles in scientific research.

Identify the purpose and benefits of a double-blind study.

---

Definitions:

Ionic Bond

Chemical bond in which ions are attracted to one another by opposite charges.

Transferred

The act of moving or passing something from one place, person, or thing to another.

Shared Equally

Distributed in an identical manner among all parties involved, ensuring parity and fairness.

Atomic Mass

The mass of an atom expressed in atomic mass units (amu), approximately equivalent to the total number of protons and neutrons in the atom's nucleus.