Electronic Communication Systems Quiz
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Questions and Answers

What is the most important factor in a communication system?

  • Atmospheric conditions
  • The antenna (correct)
  • The time of day
  • The frequency of the signal

    • Which of the following is NOT a factor that affects radio frequency wave propagation?

  • The type of modulation used (correct)
  • Time of the day
  • Frequency of the signal
  • Atmospheric conditions

    • Which path do ground waves follow?

  • They follow the curvature of the Earth and remain close to the surface (correct)
  • They are radiated into the upper atmosphere and bent or reflected back to Earth
  • They travel in a straight line from the transmitting antenna to the receiving antenna
  • They propagate along metallic wires or optical fibers

    • At what frequency range are ground waves strongest?

    <p>Low and medium frequencies</p> Signup and view all the answers

    What type of communication is limited by the curvature of the Earth and requires antennas to be high enough?

    <p>Line-of-sight communications</p> Signup and view all the answers

    Which of the following is NOT a basic path for radio frequency wave propagation?

    <p>Guided waves</p> Signup and view all the answers

    What are the characteristics of skywave signals?

    <p>They are radiated by the antenna into the upper atmosphere where they are bent or reflected back to Earth</p> Signup and view all the answers

    Which of the following is an example of line-of-sight communications?

    <p>Frequency modulation (FM) broadcast signals</p> Signup and view all the answers

    What is the primary limitation of line-of-sight communications?

    <p>Curvature of the Earth</p> Signup and view all the answers

    How can electromagnetic energy propagate, according to the text?

    <p>As a voltage or current along metallic wires, emitted radio waves through space, or as light waves down an optical fiber</p> Signup and view all the answers

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