An 800-KHz Radio Signal Is Detected at a Point 9

question 1

Multiple Choice

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

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Definitions:

Electrophilic Addition

A type of chemical reaction where an electrophile forms a bond with a nucleophile by adding to a double or triple bond.

Trans-2-Deuteriocyclohexan-1-Ol

A deuterium-labeled cyclohexanol where the deuterium atom is located at the second position in a trans configuration relative to the hydroxyl group.

Cyclohexene

A six-carbon cyclic compound with one double bond, often used as a precursor in organic synthesis.

Electron Flow

The movement of electrons through or between molecules, typically in the context of chemical reactions or electrical circuits.