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ECE :: Network Analysis and Synthesis

  1. The poles with greater displacement from the real axis correspond to

  2. A.
    higher frequencies of oscillation
    B.
    stable response
    C.
    lower frequencies of oscillation
    D.
    unbounded output

  3. In figure, the capacitor is charged to 1 V. At t = 0 the switch is closed so that i = e-t. When i = 0.37 A, the voltage across capacitor is

  4. A.
    1 V
    B.
    0.63 V
    C.
    0.37 V
    D.
    0.185 V

  5. In a series RLC circuit p.f is lagging when f < resonance frequency.

  6. A.
    True
    B.
    False

  7. The Voltage e0 in the figure,

  8. A.
    2 V
    B.
    4 V
    C.
    4/3 V
    D.
    8 V

  9. Assertion (A): is positive real.

    Reason (R): For a positive real function Re[H(jω)] ≥ 0 for 0 ≤ ω ≤ ∞.

  10. A.
    Both A and R are true and R is correct explanation of A
    B.
    Both A and R are true and R is not the correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

  11. A constant k band pass filter has a pass band from 100 to 400 Hz. The resonant frequency of series and shunt arms is

  12. A.
    3000 Hz
    B.
    2500 Hz
    C.
    2000 Hz
    D.
    1500 Hz

  13. The circuit in figure is switched on at t = 0. At any time t, i(t) =

  14. A.
    3 + 3e-1
    B.
    6 - 3e-1
    C.
    3 - 3e-t
    D.
    6 - 6e-1

  15. Two similar coupled coils are connected in series. The total inductance in series aiding connection is 100 mH. If currents is 3 A, the energy stored in magnetic field is

  16. A.
    0.9 J
    B.
    0.45 J
    C.
    0.225 J
    D.
    1.8 J

  17. Thevenin's impedance of an ac network is in general

  18. A.
    resistance
    B.
    R and L in series
    C.
    R and C in series
    D.
    Either R and L or R and C in series

  19. If operator 'a' = 1 ∠120° then (1 - a) =

  20. A.
    3
    B.
    3 ∠ - 30°
    C.
    3 ∠ + 30°
    D.
    3 ∠60°