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Quiz: Signals & Systems Set-1

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Number of Questions: 40

Question: 26 -

What does the signalling rate in the digital communication system imply?

Options:

  1. Number of digital pulses transmitted per minute

  2. Number of digital pulses received per minute

  3. Number of digital pulses transmitted per second

  4. Number of digital pulses received per second

    5. Answer:

    Number of digital pulses transmitted per second
    Solution not available.

Question: 27 -

Which property of fourier transform gives rise to an additional phase shift of -2π ftd for the generated time delay in the communication system without affecting an amplitude spectrum?

Options:

  1. Linearity

  2. Duality

  3. Time Shifting

  4. Time Scaling

    5. Answer:

    Time Shifting
    Solution not available.

Question: 28 -

Why are the negative & positive phase shifts introduced for positive & negative frequencies respectively in amplitude and phase spectra?

Options:

  1. To maintain the symmetry of the phase spectrum

  2. To change the symmetry of the phase spectrum

  3. Both a & b

  4. None of the above

    5. Answer:

    To maintain the symmetry of the phase spectrum
    Solution not available.

Question: 29 -

Which phenomenon occurs due to an increase in the channel bandwidth during the transmission of narrow pulses in order to avoid any intervention of signal distortion?

Options:

  1. Expansion in time domain

  2. Compression in frequency domain

  3. Compression in time domain

  4. Expansion in frequency domain

    5. Answer:

    Expansion in frequency domain
    Solution not available.

Question: 30 -

As the signalling rate increases, _______

Options:

  1. None of the above

  2. Width of each pulse increases

  3. Width of each pulse remains unaffected

  4. Width of each pulse decreases

    5. Answer:

    Width of each pulse decreases
    Solution not available.