Home / ECE / Network Analysis and Synthesis :: Section 14

ECE :: Network Analysis and Synthesis

  1. The zeros of a minimum phase function lie on

  2. A.
    imaginary axis
    B.
    left half plane or origin
    C.
    left half plane or imaginary axis
    D.
    right half plane or origin

  3. A network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage

  4. A.
    will become half
    B.
    will remain unchange
    C.
    will become one third
    D.
    cannot be determined unless the circuit configuration and the values of the resistors are known

  5. Which of the following statements is correct?

  6. A.
    R-C is a dual pair
    B.
    LC is a dual pair
    C.
    Norton is a series circuit
    D.
    Thevenin equivalent a parallel circuit

  7. Which of the following statements is correct?

  8. A.
    In the magnetic circuit energy is needed continuously to maintain the flux
    B.
    In the magnetic circuit energy is needed continuously to maintain the flux
    C.
    The flow of current in the electric circuit involves discontinuous expedition of energy
    D.
    The flow of current in the electric circuit requires energy for creating the current but not to maintain it

  9. The response to sinusoidal excitation can be found by

  10. A.
    settings s = jω in the network function
    B.
    settings s = - jω in the network function
    C.
    taking inverse transform of network function
    D.
    none of the above

  11. The time constant of an R.C. circuit increases if the value of resistance is

  12. A.
    increased
    B.
    decreased
    C.
    either of the above
    D.
    none of the above

  13. For an RC impedance function

  14. A.
    all poles lie on jω axis
    B.
    all poles are simple ,
    C.
    all poles are simple and lie on negative real axis
    D.
    none of the above

  15. Assertion (A): In high Q circuits poles of Y(s) lie close to ω axis in complex frequency plane.

    Reason (R): Q is inversely proportional to damping factor.

  16. 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

  17. If the ratio p(s)/q(s) represents a transfer function then

  18. A.
    the degree of p(s) may be as small as zero, independent of degree of q(s)
    B.
    the degree of p(s) and q(s) must be equal
    C.
    the degrees of p(s) and q(s) must not be equal
    D.
    the degrees p(s) and q(s) must differ by at least two

  19. In the above circuit, if the power dissipated in the 6 Ω resistor is zero then V is

  20. A.
    20 2∠ 45°
    B.
    20 ∠ 30°
    C.
    20 ∠ 45°
    D.
    20 2∠ 30°