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ECE :: Network Analysis and Synthesis

  1. In figure, the switch is closed at t = 0 when current through inductor is 6 A, the rate of change of current through resistor is 6 A/s. The value of L is

  2. A.
    1 H
    B.
    2 H
    C.
    3 H
    D.
    4 H

  3. In figure, the switch is closed at t = 0. At t = 0+, di/dt = 4 A/s. Then V =

  4. A.
    10 V
    B.
    20 V
    C.
    40 V
    D.
    80 V

  5. The equivalent inductance seen at terminals A - B is

  6. A.
    14 H
    B.
    20 H
    C.
    10 H
    D.
    4 H

  7. For the lattice circuit shown in the figure Za = j2 Ω and Zb = 2 Ω. The values of the open circuit impedance parameters Z = are


  8. For the R-L circuit shown in the figure, the input voltage vi(t) = U(t). The current i(t) is


  9. If f(t) = - f(- t) and f(t) satisfies Dirichlet conditions, then f(t) can be expanded in Fourier series having

  10. A.
    sine terms only
    B.
    cosine terms only
    C.
    cosine and constant terms
    D.
    sine and constant term

  11. A parallel plate capacitor has plate area A and distance between the plates is d. It has two dielectrics each of thickness d and area 0.5 A. The dielectric constants are ∈1 and ∈2. The total capacitance is given by the equation


  12. Which of the following theorems can be conveniently used to find power consumed in 10 Ω resistor in figure?

  13. A.
    Thevenin theorem
    B.
    Maximum power transfer theorem
    C.
    Millman's theorem
    D.
    Superposition theorem

  14. In the circuit of figure is

  15. A.
    I1 will always lag I3
    B.
    I2 may be in phase or lag I3
    C.
    I3 will always lag I2
    D.
    I2 and I3 will be in phase

  16. The VTH at terminals A and B is equal to

  17. A.
    0 V
    B.
    5 V
    C.
    -5 V
    D.
    none