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Quiz: Signals and Systems Set-3

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Number of Questions: 25

Question: 6 -

The system with given pole-zero diagram is

Options:

  1. casual

  2. non-casual

  3. not-possible

  4. both sided

    5. Answer:

    not-possible
    Solution not available.

Question: 7 -

The analog signal m(t) is given below m(t) = 4 cos 100 pt + 8 sin 200 pt + cos 300 pt, the Nyquist sampling rate will be

Options:

  1. 1/300

  2. 1/100

  3. 1/600

  4. 1/200

    5. Answer:

    1/300
    Solution:

    m (t) = 4 cos 100 pt + 8 sin 200 pt + cos 300 pt

    Nyquist sampling freq fs ≤ 2fm where fm is highest frequency component in given signal and highest fm in 3rd part

    2pfmt = 300 pt

    fm = 150 Hz

    fs = 2 x 150 p 300 Hz

Question: 8 -

Which one is a linear system?

Options:

  1. y[n] = x2[n]

  2. y[n] = x[n] x x[n - 1]

  3. None of these

  4. y[n] = x[n] + x[n - 10]

    5. Answer:

    y[n] = x[n] + x[n - 10]
    Solution not available.

Question: 9 -

The ROC of sequence in the Z.T. of sequence x[n] = an ∪ [n] is

Options:

  1. |z| < a

  2. z < a

  3. z > a

  4. |z| > a

    5. Answer:

    |z| > a
    Solution not available.

Question: 10 -

δ(t) is a

Options:

  1. none

  2. neither energy nor power

  3. power signal

  4. energy signal

    5. Answer:

    power signal
    Solution:

    Because Unit step is a Power signal. So By trignometric identifies d(t) also power.