An 800-KHz Radio Signal Is Detected at a Point 4

question 13

Multiple Choice

An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 0.63 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 magnetic field amplitude of the signal at that point? (c = 3.0 x 10⁸ m/s, μ₀ = 4π × 10^-7 T ∙ m/A, ε₀ = 8.85 × 10^-12 C²/N ∙ m²)

• A) 2.1 nT
• B) 1.7 nT
• C) 1.3 nT
• D) 2.5 nT
• E) 2.9 nT

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Definitions:

Job Simplification

The method of decomposing a task into its most basic elements to enhance productivity and minimize intricacy.

Total Mechanization

The complete automation or use of machinery to perform all tasks in a process or system, eliminating the need for manual labor.

Automation

The total mechanization of a job.

Job Simplification

The process of breaking down jobs into their simplest components to improve efficiency and reduce complexity.