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Home ‣ Electronics and Communication Engineering ‣ Signals and Systems Comments
  • Question

  • A voltage V(t) is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt2. If it is measured by a dc meter. The reading will be


  • Options
  • A. 0
  • B. 4
  • C. 2
  • D. 2

  • Correct Answer
  • 0 

    Explanation
    DC meter reads mean value.

    Signals and Systems problems

    Search Results

    • 1. If then for this to be true x(t) is

    • Options
    • A. exp (j2p f/t)
    • B. exp (-j2p f/t)
    • C. exp (j2p ft)
    • D. exp (-j2p f/t)
      • Discuss
    • 2. If f(t) = A d(t - a), F(s) is

    • Options
    • A. A e-as
    • B. A eas
    • C. A a e-as
    • D. Aa eas
      • Discuss
    • 3. The analog signal given below is sampled by 600 samples per second for m(t) = 3 sin 500 pt + 2 sin 700 pt then folding frequency is

    • Options
    • A. 500 Hz
    • B. 700 Hz
    • C. 300 Hz
    • D. 1400 Hz
      • Discuss
    • 4. If I (s) , initial value of i(t) is

    • Options
    • A. 5A
    • B. 12.5 A
    • C. 0.05 A
    • D. 1250 A
      • Discuss
    • 5. Inverse Fourier transform of sgn (?) is

    • Options
    • A.
    • B. 1
    • C. U(t)
    • D.
      • Discuss
    • 6. ?(t) is a

    • Options
    • A. energy signal
    • B. power signal
    • C. neither energy nor power
    • D. none
      • Discuss
    • 7. Which one most appropriate dynamic system?

    • Options
    • A. y(n) + y(n - 1) + y(n + 1)
    • B. y(n) + y(n - 1)
    • C. y(n) = x(n)
    • D. y(n) + y(n - 1) + y(n + 3) = 0
      • Discuss
    • 8. Inverse Laplace transform of is

    • Options
    • A. 2 exp (- 2.5 t) cosh (0.5 t)
    • B. exp (- 2 t) + exp (- 3 t)
    • C. 2 exp (- 2.5 t) sinh (0.5 t)
    • D. 2 exp (- 2.5 t) cos 0.5 t
      • Discuss
    • 9. Laplace transform of a pulse function of magnitude E and duration from t = 0 to t = a is

    • Options
    • A. E / s
    • B.
    • C.
    • D.
      • Discuss
    • 10. The z-transform of a particular signal is given
      where

      The system after implementation will be

    • Options
    • A. casual and stable
    • B. non-casual and stable
    • C. non-casual and unstable
    • D. casual and unstable
      • Discuss

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