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ECE :: Exam Questions Paper

  1. If we manage to __________ our natural resources, we would leave a better planet for our children.

  2. A.
    uphold
    B.
    restrain
    C.
    Cherish
    D.
    conserve

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  3. (2)3 + (3)4 = (?)5

  4. A.
    4
    B.
    11
    C.
    none of these
    D.
    not possible

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  5. If g(t) = e- p t2 then G(0) is __________ (where g(t)⇔ G(f)

  6. A.
    B.
    unity
    C.
    D.
    impulse at f = 0

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  7. The open loop transfer function of a unity feedback system is: The range of K for which the system is stable is

  8. A.
    B.
    13 > K > 0
    C.
    D.
    -6 < K < ∞

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  9. A discrete time linear shift-invariant system has an impulse response h[n] with h[0] = 1, h[1] = - 1, h[2] - 2, and zero otherwise. The system is given an input sequence x[n] with x[0] - x[2] - 1, and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[2] are, respectively

  10. A.
    5, 2
    B.
    6, 2
    C.
    6, 1
    D.
    5, 3

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  11. For a series resonant circuit at low frequency circuit impedance is __________ and at high frequency circuit impedance is __________
    Fill in the blanks respectively

  12. A.
    capacitive, inductive
    B.
    inductive, capacitive
    C.
    resistive, inductive
    D.
    capacitive, resistive

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  13. The network is

  14. A.
    First order system and the pole
    B.
    Second order system of the two poles are
    C.
    Second order system of the poles is
    D.
    none of the above

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  15. A signal with ± 10 V ranged and 1 KHz band width is being digitized using a sample and hold circuit and a 10 bit quantizer. The minimum sampling rate is :

  16. A.
    62831.9 V/sec
    B.
    125663.8 V/sec
    C.
    31415.95 V/sec
    D.
    None

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  17. The circuit below represents function X(A, B, C, D) as:

  18. A.
    Σ(5, 8, 13, 14)
    B.
    ∏(0, 1, 2, 3, 4, 6, 7, 8, 10, 11, 12)
    C.
    Σ(5, 9, 13, 14)
    D.
    ∏(0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 15)

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  19. The truth table corresponding to the given input digital gate :

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