Quiz In Communication System

10 Questions | Total Attempts: 114

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Quiz In Communication System


Questions and Answers
  • 1. 
     _________ is the equipment which converts physical message, such as sound, words, pictures etc., into corresponding electrical signal.
    • A. 

      Transmitter

    • B. 

      Receiver

    • C. 

      Channel

    • D. 

      All the above

  • 2. 
    __________ is equipment which converts electrical signal back to the physical message.
    • A. 

      Transmitter

    • B. 

      Receiver

    • C. 

      Channel

    • D. 

      All the options

  • 3. 
    The process by which some characteristics (i.e. amplitude, frequency, and phase) of a carrier are varied in accordance with a modulating wave is called as
    • A. 

      Modulation

    • B. 

      Demodulation

    • C. 

      Multiplexing

    • D. 

      Demultiplexing

  • 4. 
    In communication system, Noise is most likely to affect the signal 
    • A. 

      At the transmitter

    • B. 

      In the channel

    • C. 

      In the information source

    • D. 

      At the destination

  • 5. 
    Phase of the carrier signal is varied according to amplitude of message signal is known as
    • A. 

      Frequency Modulation

    • B. 

      Amplitude Modulation

    • C. 

      Phase Modulation

    • D. 

      Pulse Modulation

  • 6. 
    Total power of Amplitude modulated wave is equal to 1.5 times of carrier wave power.
    • A. 

      True

    • B. 

      False

  • 7. 
    The ratio between the modulating signal voltage and the carrier voltage is called?
    • A. 

      Amplitude modulation

    • B. 

      Modulation frequency

    • C. 

      Modulation index

    • D. 

      Ratio of modulation

  • 8. 
    In Frequency Modulation –
    • A. 

      Amplitude of the carrier remains same

    • B. 

      Frequency of the carrier varies in accordance with the modulating signal

    • C. 

      Phase of the carrier remains same

    • D. 

      All of the above

  • 9. 
    In PM  the information is transmitted using _______ 
    • A. 

      Change in frequency and amplitude

    • B. 

      Change in frequency

    • C. 

      Change in amplitude

    • D. 

      Change in phase of the carrier

  • 10. 
    Which of the following are two most important classes of angle modulation?
    • A. 

      Amplitude modulation, frequency modulation

    • B. 

      Amplitude modulation, phase modulation

    • C. 

      Frequency modulation, phase modulation

    • D. 

      Single sideband amplitude modulation, phase modulation

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