Home / ECE / Network Analysis and Synthesis :: Section 22

ECE :: Network Analysis and Synthesis

  1. Consider the following expression for the driving point impedance

    1. It represent on LC circuit
    2. It represent on RLC circuit
    3. It has poles lying on the jω axis
    4. It has a pole at infinite frequency and a zero at zero frequency.
    Which one fo the statement given above are correct?

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

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  3. Two port network is said to be symmetrical if

  4. A.
    Δh = 1
    B.
    Z11 = Z2
    C.
    A = Δ
    D.
    all

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  5. For a series resonant circuit at low frequency impedance is __________ and at high frequency circuit impedance is __________ .

  6. A.
    capacitive, inductive
    B.
    inductive, capacitive
    C.
    resistive, inductive
    D.
    capacitive, resistive

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  7. If Y(s) = 1 + s, the network has

  8. A.
    1 Ω resistor and 1 F capacitor in series
    B.
    1 Ω resistor and 1 F capacitor in parallel
    C.
    1 Ω resistor and 1 H inductor in series
    D.
    1 Ω resistor and 1 H inductor in parallel

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  9. In a Hurwitz polynomial

  10. A.
    all coefficients are non-negative
    B.
    both the odd and even parts have roots on jω axis
    C.
    the continued fraction expansion is the ratio of odd to even parts of a Hurwitz polynomial yields all positive quotient terms
    D.
    all of the above

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  11. The polarities of the magnetised iron rod of are

  12. A.
    A is N, B is S and C is neutral
    B.
    A is N, B is S and C is S
    C.
    A is N, B is N and C is S
    D.
    A is S, N is S and C is N

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  13. Nichrome is commonly used for

  14. A.
    lamp filaments
    B.
    transformer winding
    C.
    heater coils
    D.
    battery connections

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  15. Thevenin's equivalent circuit

  16. A.
    can be drawn only in time domain
    B.
    can be drawn only in frequency domain
    C.
    can be drawn both in time and frequency domain
    D.
    can be drawn in frequency domain with some restrictions

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  17. A series RC circuit has fixed R and C and variable f. The current locus will lie in the first quadrant.

  18. A.
    True
    B.
    False

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  19. Which of the following statement is false?

  20. A.
    Bandwidth of a circuit is given by the range of frequencies lying between half-power points
    B.
    Half-power points on a resonance curve are those points where power is half of that at resonance
    C.
    Half-power points are also known as 3 dB points
    D.
    At both half-power points, the p.f. = 0.707 lagging

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