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  • Question
  • In Laplace transform, multiplication by e-at in time domain becomes


  • Options
  • A. translation by a in s domain
  • B. translation by (-a) in s domain
  • C. multiplication by e-as in s domain
  • D. none of the above

  • Correct Answer
  • translation by a in s domain 

    Explanation
    £e-at f(t) = F(s + a).

    Signals and Systems problems


    Search Results


    • 1. If and A + B is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 2. A box has 4 white and 3 red balls. Two balls are taken out in succession. What is the probability that both are white?

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 3. A signal g(t) = A then g(t) is a

    • Options
    • A. energy signal
    • B. power signal
    • C. neither energy nor power signal
    • D. insufficient data
    • Discuss
    • 4. Which one is a causal system?

    • Options
    • A. y(n) = 3x[n] - 2x[n - 1]
    • B. y(n) = 3x[n] + 2x[n + 1]
    • C. y(n) = 3x[n + 1] + 2x[n - 1]
    • D. y(n) = 3x[n + 1] 2x[n - 1] + x[n]
    • Discuss
    • 5. The final value theorem is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 6. A first order system will never be able to give a __________ response

      1. band stop
      2. band pass
      3. all pass
      Choose the correct option

    • Options
    • A. 1, 2, 3 true
    • B. 1 and 3 true, 2 false
    • C. 1, 2 are true 3 is false
    • D. 1, 2 are false, 3 is true
    • Discuss
    • 7. The ROC of sequence in the Z.T. of sequence x[n] = an ? [n] is

    • Options
    • A. z > a
    • B. z < a
    • C. |z| > a
    • D. |z| < a
    • Discuss
    • 8. The Fourier series of an odd periodic function contains

    • Options
    • A. odd harmonics only
    • B. even harmonics only
    • C. cosine harmonics only
    • D. sine harmonics only
    • Discuss
    • 9. If transfer function of a system is H(z) = 6 + z-1 + z-2 then system is

    • Options
    • A. minimun phase
    • B. maximum phase
    • C. mixed phase
    • D. none
    • Discuss
    • 10. If

    • Options
    • A. - 12
    • B. 12
    • C. 20
    • D. - 20
    • Discuss


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