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ECE :: Exam Questions Paper

  1. Locus of a point Z satisfying the equation arg is:

  2. A.
    Straight line with equation y = x - 3
    B.
    Circle with equation x2 + y2 - 3x + 3y = 0
    C.
    Hyperbola with equation x2 - y2 - 3x - 3y - 2yx = 0
    D.
    None of these

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  3. A silicon PN junction with no bias have a doping concentration of
    Nd = 2 x 1016 cm-3 and Na = 1016 cm-3. The space charge width is:

  4. A.
    3.345 x 10-3 cm
    B.
    3.345 x 10-4 cm
    C.
    3.345 x 10-5 cm
    D.
    3.345 x 10-6 cm

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  5. In 8085, Whenever a signal is received at TRAP terminal its program execution is transferred to a subroutine on address __________ .

  6. A.
    0000 H
    B.
    0024 H
    C.
    002 CH
    D.
    provided by the address generation logic

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  7. If (225)Y = (165)8 find value of Y

  8. A.
    7
    B.
    8
    C.
    9
    D.
    11

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  9. The equivalent circuit for the following network is :

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  11. ωH =

  12. A.
    108 rad/sec
    B.
    104 rad/sec
    C.
    102 rad/sec
    D.
    10 rad/sec

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  13. The given characteristic polynomial s4 + s3 + 2s2 + 2s + 3 = 0 has

  14. A.
    zero root in RHS of s-plane
    B.
    one root in RHS of s-plane
    C.
    two roots in RHS of s-plane
    D.
    three roots in RHS of s-plane

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  15. In n-well CMOS fabrication substrate is:

  16. A.
    heavily doped n-type
    B.
    heavily doped p-type
    C.
    lightly doped n-type
    D.
    lightly doped p-type

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  17. The transfer function of a zero-order-hold system is :

  18. A.
    (l/s)(l + e-sT)
    B.
    (1/s)(1 - e-sT)
    C.
    1 - (l/s)e-sT
    D.
    1 + (1/s)e-sT

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