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

ECE :: Network Analysis and Synthesis

  1. Kirchoff's laws are applicable to

  2. A.
    dc circuits
    B.
    circuits with sinusoidal excitation only
    C.
    dc circuits and circuits with sinusoidal excitation
    D.
    circuits with any excitation

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  3. Figure shows a parallel resonant circuit having resonance frequency of 15 MHZ. At this frequency

  4. A.
    its impedance is minimum
    B.
    its impedance is maximum
    C.
    its impedance is infinite
    D.
    its impedance is zero

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  5. In an R-C circuit, there is an initial voltage of 3 V across the capacitor. In s domain equivalent circuit, the voltage source to take into account the initial voltage has a strength of

  6. A.
    B.
    3s
    C.
    D.
    3Cs

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  7. An electrical network with 8 independent nodes will have __________ nodal equations.

  8. A.
    4
    B.
    6
    C.
    7
    D.
    8

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  9. An RLC series circuit has . If the poles p1 and p1* are close to jω axis, then

  10. A.
    Q is high
    B.
    Q is low
    C.
    ω0 is high
    D.
    bandwidth is large

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  11. Assertion (A): When a square periodic wave is applied to an RC circuit, the voltage across capacitor is observed to be a triangular periodic wave.

    Reason (R): The RC circuit works as integrator and its time constant is much larger than time period of input wave.

  12. 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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  13. Assertion (A): In a series resonant circuit current is maximum at resonance.

    Reason (R): The inductive and capacitive reactances are equal.

  14. 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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  15. A series RL circuit is excited by a voltage v(t) = Ve-at such that a = R/L. Then the circuit current is

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  17. In the transformer shown in the figure, the inductance measured across the terminal 1 and 2 was 4 H with open terminals 3 and 4. It was 3H when the terminals 3 and 4 were short circuited. The coefficient of coupling would be

  18. A.
    1
    B.
    0.707
    C.
    0.5
    D.
    indetermine due to insufficient data

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  19. An ac network has two sources of the same frequency. The currents in one branch when the sources act independently are 10 ∠30° A and 10 ∠60° A. When both sources act, the current in the branch should be

  20. A.
    19.32 ∠45°
    B.
    15 ∠45°
    C.
    20 ∠45°
    D.
    zero

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