Home / ECE / Network Analysis and Synthesis :: Section 24

ECE :: Network Analysis and Synthesis

  1. In a circuit with capacitance connected to ac source, the rate of change of capacitor voltage is constant.

  2. A.
    True
    B.
    False

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  3. Assertion (A): If Z1(s) and Z2(s) are positive real then Z1(s) + Z2(s) as well as 1/Z1(s) and 1/Z2(s) are positive real.

    Reason (R): The poles of a positive real function are real or occur in conjugate pairs.

  4. 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

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  5. A variable resistance R and capacitive reactance XC are connected in series. As R is varied, the locus of Z is

  6. A.
    a straight line parallel to Y axis in 4th quadrant
    B.
    a straight line parallel to X axis in 4th quadrant
    C.
    a straight line parallel to Y axis in second quadrant
    D.
    a straight line parallel to Y axis in first quadrant

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  7. The dual of a node is

  8. A.
    mesh
    B.
    principal node
    C.
    tree branch
    D.
    link

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  9. At t = 0+, the current i1 is

  10. A.
    - V/2R
    B.
    - V/4R
    C.
    - V/R
    D.
    zero

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  11. Kirchoff's laws are applicable to

  12. A.
    dc only
    B.
    ac sinusoidal wave only
    C.
    dc and ac sinusoidal waves
    D.
    all wave shapes

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  13. The double energy transients occur in the

  14. A.
    pure inductive coil
    B.
    R-L circuit
    C.
    R-C circuit
    D.
    R-L-C circuit

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  15. The capacitance of a parallel plate capacitor varies as per the equation C(t) = C0 (1 - cos ωt). It is connected to a battery of V volts. The equation for current is

  16. A.
    ωC0V (1 - cos ωt)
    B.
    ωC0V(1 - sin ωt)
    C.
    ωC0V (1 - sin 2ωt)
    D.
    ωC0V sin ωt

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  17. Which one of the following is a passive device/Component?

  18. A.
    Transformer
    B.
    Oscillator
    C.
    Generator
    D.
    None

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  19. Which one of the following theorem can be conveniently used to calculate the power consumed by the 10 Ω resistor in the network shown in the above figure?

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

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