Home / ECE / Network Analysis and Synthesis :: Section 25

ECE :: Network Analysis and Synthesis

  1. The circuit shown in figure is a

  2. A.
    low pass filter
    B.
    high pass filter
    C.
    band pass filter
    D.
    band stop filter

  3. For a reactance function H(s)

  4. A.
    Re [H(jω)] is positive for ω ≥ 0
    B.
    Re [H(jω)] is zero for ω ≥ 0
    C.
    Re [H(jω)] is positive or zero for ω ≥ 0
    D.
    Re [H(jω)] is zero or negative for ω ≥ 0

  5. A sinusoidal current having peak value of 7.07 A is superimposed on dc of 5A. If a hot-wire ammeter is used to measure the combined current in the circuit, it will indicate __________ ampere.

  6. A.
    7.07
    B.
    10
    C.
    12.07
    D.
    2.07

  7. An ideal current source has

  8. A.
    infinite source resistance
    B.
    zero source resistance
    C.
    large value of source resistance
    D.
    finite value of source resistance

  9. The series element in band pass filter is

  10. A.
    capacitive
    B.
    inductive
    C.
    parallel combination of inductance and capacitance
    D.
    series combination of inductance and capacitance

  11. The flux linkage ψ, self inductance L and current i are related as

  12. A.
    ψ = L/i
    B.
    ψ = Li
    C.
    ψ = Li2
    D.

  13. Assertion (A): A band elimination filter attenuates signals whose frequencies lie between the cutoff frequencies.

    Reason (R): A band elimination circuit is very different from band pass circuit.

  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

  15. In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will

  16. A.
    be reduced by half
    B.
    be doubled
    C.
    be four times as high
    D.
    be reduced to one fourth

  17. Two coupled coils lie in parallel planes such that 50% of magnetic flux produced by one links the other. The coefficient of coupling is

  18. A.
    0.5
    B.
    0.25
    C.
    0.125
    D.
    0.5

  19. The unit of permeability is

  20. A.
    T
    B.
    Wb
    C.
    H/M
    D.
    H