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ECE :: Network Analysis and Synthesis

  1. For a series circuit of R and variable XL the admittance locus is

  2. A.
    a semicircle in first quadrant
    B.
    a semicircle in fourth quadrant
    C.
    a straight line in first quadrant
    D.
    a straight line in fourth quadrant

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  3. A series RLC circuit is supplied from a variable frequency source. The resonant frequency is ω0. The voltage across L is maximum at a frequency

  4. A.
    equal to ω0
    B.
    slightly less than ω0
    C.
    slightly more than ω0
    D.
    none of the above

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  5. Current in a 2H inductance in 10e-t A. Admittance of the inductor is

  6. A.
    -0.5 mho
    B.
    0.5 mho
    C.
    5 mho
    D.
    10 mho

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  7. A constant k low pass filter has fc = 1000 Hz. At f = 500 Hz, the phase shift is

  8. A.
    p
    B.
    zero
    C.
    more than p
    D.
    less than p

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  9. At resonance the network function magnitude will be

  10. A.
    k/a
    B.
    k/b
    C.
    c
    D.
    k/a + b

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  11. Giga watt is equal to

  12. A.
    1012 W
    B.
    109 W
    C.
    106 W
    D.
    103 W

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  13. Which one of the following is a cut set of the graph in the given figure?

  14. A.
    1, 2, 3, and 4
    B.
    2, 3, 4, and 6
    C.
    1, 4, 5, and 6
    D.
    1, 3, 4, and 5

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  15. A 3 phase star-connected load has one capacitor C in R phase and two equal resistances in Y and B phases.The phase sequence is RBY. Then

  16. A.
    VB0 > VY0
    B.
    VB0 < VY0
    C.
    VB0 = VY0
    D.
    VB0 = VBY

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  17. Reciprocity theorem is applicable to

  18. A.
    circuits with one source
    B.
    circuits with only one independent source
    C.
    circuits with any number of sources
    D.
    circuits with any number of independent sources

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  19. The first and the last critical frequencies (singularities) of a driving point impedance function of a passive network having two kind of elements, are a pole and a zero respectively. The above property will be satisfied by

  20. A.
    RL network only
    B.
    RC network only
    C.
    LC network only
    D.
    RC as well as RL network

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