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Exam Questions Paper - Section 22

  1. Find the Fourier transform of the half cosine pulse as shown below :

    2. A.
    0.5 {sin c [0.25(f - 1)] + sin c [2.5(f + 1)]}
    B.
    0.5 {sin c [0.5(f - 1)] + sin c [0.5(f + 1)]}
    C.
    0.25 {sin c [0.25(f - 1)] + sin c [0.25 (f - 1)]}
    D.
    0.25 {sin c [0.5(f - 1)] + sin c [0.5(f - 1)]}

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  2. The q-v relation of a capacitor is v = 1 + q + qx. Find the amount of energy required to charge this capacitor from q(t0) = 0 to q(t) = 5 C.

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  3. V-I relationship of a network N is given by, V = 8 - 4I.

    The equivalent circuit to the network N is shown below
    The values of IN and RN are

    4. A.
    0, 2
    B.
    0, 4
    C.
    2, 4
    D.
    None of these

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  4. If the open-loop transfer function is a ratio of a numerator polynomial of degree 'm' and a denominator polynomial of degree 'n', then the integer (n - m) represents the number of:

    5. A.
    breakaway points
    B.
    unstable poles
    C.
    separate root loci
    D.
    asymptotes

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  5. The transfer function of a system is . The characteristic equation of the system is :

    6. A.
    2s2 + 6s + 5 = 0
    B.
    (s + l)2 (s + 2) = 0
    C.
    2s2 + 6s + 5 + (s + 1 )2(s + 2) = 0
    D.
    2s2 + 6s + 5 - (s + l)2(s + 2) = 0

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  6. If V = 4 in the figure, the value of IS is given by,

    7. A.
    6 A
    B.
    5/2 A
    C.
    12 A
    D.
    None of these

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  7. Choose correct option for a stable system :

    1. Roots of the characteristic equation of the system are real and negative
    2. Area within the impulse response is finite

    8. A.
    I is true, II is true
    B.
    I is true, II is false
    C.
    I is false, II is true
    D.
    I is false, II is false

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  8. The number of distinct Boolean expressions of 3 variables is

    9. A.
    8
    B.
    256
    C.
    64
    D.
    7

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