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  • Question
  • What about the stability of system in What about the stability of system in system is stable unstable stable at 0.4 cant say ROC include t


  • Options
  • A. system is stable
  • B. unstable
  • C. stable at 0.4
  • D. cant say

  • Correct Answer
  • system is stable 

    Explanation
    ROC include the unit circle hence it is stable.

    Signals and Systems problems


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    • 1. Double integration of a unit step function would lead to

    • Options
    • A. an impulse
    • B. a parabola
    • C. a ramp
    • D. a doublet
    • Discuss
    • 2. A pole zero pattern of a certain filter is shown in figure. This filter must be

    • Options
    • A. LPF
    • B. BFP
    • C. HPF
    • D. APF
    • Discuss
    • 3. Which one is a linear system?

    • Options
    • A. y[n] = x[n] x x[n - 1]
    • B. y[n] = x[n] + x[n - 10]
    • C. y[n] = x2[n]
    • D. (a) and (c)
    • Discuss
    • 4. 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
    • A. 1/100
    • B. 1/200
    • C. 1/300
    • D. 1/600
    • Discuss
    • 5. A signal m(t) is multiplied by a sinusoidal waveform of frequency fc such that
      v(t)=m(t) cos 2pfct
      If Fourier transform of m(t) is M(f), Fourier transform of v(t) will be

    • Options
    • A. 0.5 M(f + fc)
    • B. 0.5 M(f - fc)
    • C. 0.5 M(f + fc) + 0.5 M(f - fc)
    • D. 0.5 M(f - fc) + 0.5 M(f - fc)
    • Discuss
    • 6. The period of the function cos is

    • Options
    • A.
    • B. 8s
    • C. 4s
    • D.
    • Discuss
    • 7. Z transform is a non-linear operation.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. For the discrete time system of the given figure

    • Options
    • A. yk - 0.5 yk - 1 - 0.25 yk - 2 = uk
    • B. yk + 0.5 yk - 1 - 0.25 yk - 2 = uk
    • C. yk - 0.5 yk - 1 + 0.25 yk - 2 = uk
    • D. yk + 0.5 yk - 1 + 0.25 yk - 2 = uk
    • Discuss
    • 9. In the given figure the ratio T/d is the duty factor.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. If is the Laplace transform of f(t) then f(0+) is

    • Options
    • A. 0
    • B.
    • C. 27
    • D. ?
    • Discuss


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