Frequency, Hertz, and Signal Codification Quiz
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Questions and Answers

What unit is used to measure the frequency of a wave?

  • Hertz (correct)
  • Joule
  • Watt
  • Volt
  • Which frequency band is a common WiFi band used for communication?

  • 4 GHz
  • 3 GHz
  • 5 GHz (correct)
  • 7 GHz
  • What does amplitude modulation (AM) mainly modulate when transmitting a signal?

  • Speed
  • Phase
  • Frequency
  • Amplitude (correct)
  • In information theory, what does a signal represent?

    <p>A message sequence</p> Signup and view all the answers

    What is the process of varying the carrier wave frequency in accordance with the modulating signal called?

    <p>Frequency modulation</p> Signup and view all the answers

    What does demodulation involve in a communication system?

    <p>Decoding information</p> Signup and view all the answers

    Why was frequency modulation (FM) originally introduced?

    <p>To reduce noise and improve radio reception quality</p> Signup and view all the answers

    Who developed FM (frequency modulation) radio?

    <p>Edwin Howard Armstrong</p> Signup and view all the answers

    Which individual is known for discovering amplitude modulation (AM) radio?

    <p>Reginald Fessenden</p> Signup and view all the answers

    What is the main advantage of frequency modulation (FM) over amplitude modulation (AM)?

    <p>Less vulnerability to noise</p> Signup and view all the answers

    In communication systems, what does a channel refer to?

    <p>The medium through which messages are transmitted</p> Signup and view all the answers

    How is the capacity of a communication channel often measured?

    <p>By its bandwidth in Hz or data rate in bits per second</p> Signup and view all the answers

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