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  1. Consider a stable and causal system with impulse response h[n] and rational system function H(z). Suppose it is known that H(z) contains a pole at z = 1/2 and a zero some where on the unit circle. The precise number and locations of all of the other poles is unknown.
    The following statement which is false is __________ .

  2. A.
    H(e) = 0 for some ω
    B.
    C.
    g[n] = {n[h[n * h[n]} is the impulse response of a stable system
    D.
    h[n] has a finite duration

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  3. When transient and steady state response require improvement; a __________ is used.

  4. A.
    Lead compensator
    B.
    Lag - Lead compensator
    C.
    Lag compensator
    D.
    Integrator

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  5. For the collector-feedback amplifier shown below the voltage gain Av will be __________ .

  6. A.
    -113.07
    B.
    -103.07
    C.
    -107.07
    D.
    -93

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  7. Narrow band FM signal can be represented as

  8. A.
    A cos (2pfct) - βA sin (2pfct) sin (2pfmt)
    B.
    A cos (2pfmt) - βA sin (2pfct) sin (2pfmt)
    C.
    A cos (2pfct) + βA sin (2pfct) sin (2pfmt)
    D.
    A cos (2pfmt) + βA sin (2pfmt) sin (2pfct)

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  9. In the following transistor circuit VBE = 0. 7 V, rc = 25mV/IE, and β and the capacitance are very large

    The value of DC current IE is

  10. A.
    1 mA
    B.
    2 mA
    C.
    5 mA
    D.
    10 mA

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  11. A certain JK FF has tpd = 12 nsec. The largest MOD counter that can be constructed from these FFs and still operate up to 10 MHz is

  12. A.
    any
    B.
    8
    C.
    256
    D.
    10

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  13. A second-order system has a transfer function is given by . If the system, initially at rest is subjected to a unit step input at t = 0, the second peak in response will occur at :

  14. A.
    p sec
    B.
    p/3 sec
    C.
    p/6 sec
    D.
    p/2 sec

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  15. Value of ZL for maximum power transfer is

  16. A.
    R
    B.
    R + jωL
    C.
    R - jωL
    D.
    None of these

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  17. A periodic voltage has following values for equal time intervals changing suddenly from one value to next : 0, 5, 10, 20, 50, 60, 50, 20, 10, 5, 0, - 5, - 10 etc.
    RMS value of the waveform is :

  18. A.
    31 v
    B.
    32 v
    C.
    insufficient data
    D.
    none of these

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  19. The magnitude plot of a rational transfer function G(s) with real coefficients is shown below. Which of the following compensators has such a magnitude plot?

  20. A.
    Lead compensator
    B.
    Lag compensator
    C.
    PID compensator
    D.
    Lead-lag compensator

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