Principles of Communication: Basic Concepts Quiz
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Questions and Answers

Which of the following is not true about AM?

  • The carrier frequency remains constant. (correct)
  • The information signal amplitude changes the carrier amplitude.
  • The carrier amplitude varies.
  • The carrier frequency changes.
  • The outline of the peaks of a carrier has the shape of the modulating signal and is called the ____.

  • Envelope (correct)
  • Carrier Variation
  • Trace
  • Waveshape
  • A carrier of 880 kHz is modulated by a 3.5-kHz sine wave. The LSB and USB are respectively, ____.

  • 887 and 873 kHz
  • 876.5 and 883.5 kHz
  • 883.5 and 876.5 kHz (correct)
  • 873 and 887 kHz
  • An AM signal has a carrier power of 5W. The Percentage of modulation is 80 percent. The total sideband power is __.

    <p>1.6 W</p> Signup and view all the answers

    What is the function of an antenna in communication?

    <p>To convert current and voltage into electromagnetic waves and vice versa</p> Signup and view all the answers

    Which method of communication involves the transmission of signals through a medium such as a transmission line or fiber optics cable?

    <p>Wired communication</p> Signup and view all the answers

    What is the primary difference between wired and wireless communication?

    <p>Wired communication uses physical medium, while wireless communication does not</p> Signup and view all the answers

    In the context of communication, what does 'modulation' refer to?

    <p>The process of altering a carrier signal according to the information being transmitted</p> Signup and view all the answers

    What does the symbol 𝜆 represent in the context of communication?

    <p>Wavelength</p> Signup and view all the answers

    What is the role of transmission line or fiber optics cable in wired communication?

    <p>To provide a physical medium for signal transmission</p> Signup and view all the answers

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