Home / ECE / Network Analysis and Synthesis :: Section 22

ECE :: Network Analysis and Synthesis

  1. For node 2 in figure, KCL equation is


  2. Which one of the following is positive real function?


  3. The dynamic impedance of an R-L and C parallel circuit at resonance is __________ ohm.

  4. A.
    R/LC
    B.
    C/LR
    C.
    LC/R
    D.
    L/CR

  5. The hot resistance of a tungsten lame is about 12 times its cold resistance. Accordingly, the cold resistance of a 60 Ω, 120 V lamp is about __________ ohm.

  6. A.
    5
    B.
    240
    C.
    2
    D.
    2880

  7. The response of a function is decided by

  8. A.
    the location of its zeros
    B.
    the location of its poles
    C.
    both (a) and (b)
    D.
    none of the above

  9. An RL impedance function is to be synthesised in second Foster form. The proper function to be expanded is

  10. A.
    Z(s)
    B.
    sZ(s)
    C.
    1/Z(s)
    D.
    Z(s)/s

  11. Ideally an attenuator pad should not change

  12. A.
    voltage level
    B.
    impedance level
    C.
    power level
    D.
    voltage, power or impedance level

  13. If two networks are connected in series of individual Z parameter as Za and Zb then equivalent Z is

  14. A.
    [Z] = [Za] + [Zb]
    B.
    [Z] = [Za] [Zb]
    C.
    [Z] = [Za]/[Zb]
    D.
    [Z] = [Za] - [Zb]

  15. The model of a system

  16. A.
    is unique
    B.
    depends on desired degree of accuracy
    C.
    depends on the type of analysis
    D.
    both (b) and (c)

  17. Q of a coil

    1. increases with Q increasing frequency
    2. varies linearly with frequency
    3. increase with increasing frequency because R increases at high frequency
    4. decrease after the peak frequency because R increases at H.F. the correct statements are

  18. A.
    A, B
    B.
    C, D
    C.
    A, C
    D.
    B, D