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ECE :: Network Analysis and Synthesis

  1. A circuit has two branches 1 and 2 in parallel. If |Q1| = 8 KVAR and |Q2| = 6 KVAR, the magnitude of total kvar drawn form supply will be

  2. A.
    14 KVAR
    B.
    2 KVAR
    C.
    zero
    D.
    14 or 2 KVAR

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  3. The driving point impedance Z1 is given by

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  5. When a function Z(s) having a pole at infinity is realized, we get

  6. A.
    a capacitance in series
    B.
    a resistance in series
    C.
    an inductance in series
    D.
    a resistance or inductance in series

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  7. A specimen of a material has a resistivity of 1.78 x 108 ohm-m. The material is

  8. A.
    semiconductor
    B.
    conductor
    C.
    semiconductor or conductor
    D.
    insulator

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  9. In a purely capacitive circuit, the current __________ the voltage by __________ .

  10. A.
    lags, 0°
    B.
    leads, 90°
    C.
    lags, 90°
    D.
    lags, 45°

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  11. A circuit has two branches in parallel and each branch has only one element. The applied voltage and source current are v = 200 sin (200t + 30°) and i = 50 sin (200t + 50°). If one branch has capacitor, the other branch contains

  12. A.
    resistance
    B.
    inductance
    C.
    capacitance
    D.
    resistance or capacitance

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  13. In the circuit shown in figure, Is = 4A, Vs = 4, the voltage V is given by

  14. A.
    6 V
    B.
    8 V
    C.
    4 V
    D.
    2 V

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  15. The average value of wave in figure is

  16. A.
    90 V
    B.
    75 V
    C.
    60 V
    D.
    50 V

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  17. If B = 4 + j3, (B)1/3 =

  18. A.
    2 ∠30°
    B.
    2 ∠36.87°
    C.
    1.71 ∠12.3°
    D.
    1.71 ∠30°

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  19. A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency, the dynamic resistance is

  20. A.
    1 Ω
    B.
    10 Ω
    C.
    100 Ω
    D.
    more than 100 Ω

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