Home / ECE / Network Analysis and Synthesis :: Section 23

ECE :: Network Analysis and Synthesis

  1. A choke coil of resistance R and inductance L is shunted by capacitor C. The dynamic resistance is

  2. A.
    R/LC
    B.
    C/RL
    C.
    L/RC
    D.
    1/RLC

  3. In an LC immittance H (s)

  4. A.
    the slope of dH (jω)/dω is always negative
    B.
    the slope of dH (jω)/dω is always positive
    C.
    the slope of dH (jω)/dω may be positive or negative
    D.
    the slope of dH (jω)/dω is constant

  5. The response shown in figure is

  6. A.
    over damped
    B.
    critically damped
    C.
    under damped
    D.
    either (a) or (c)

  7. The polar plot of P (jω) = 45° as ω varies from -∞ to ∞ is

  8. A.
    a straight line parallel to x-axis
    B.
    a straight line parallel to y-axis
    C.
    a line passing through origin and inclined at 45°
    D.
    a line in first quadrant passing through origin and inclined at 45° to positive x-axis

  9. Assertion (A): A graph is planar if it has a dual.

    Reason (R): The dual of a graph can be found by window dot method.

  10. 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

  11. As x is increased from - ∞ to ∞, the function

  12. A.
    monotonically increases
    B.
    monotonically decreases
    C.
    increases to a maximum value and then decrease
    D.
    decreases to a minimum value and then increases

  13. Which of the following expressions is true for apparent power in an A.C. circuit?

  14. A.
    VI cos Φ
    B.
    Vav x Iav
    C.
    Vr.m.s x Ir.m.s
    D.
    Vpeak x Ipeak

  15. In the voltage equation v = 500 sin (1000t) V, the rms value of voltage is

  16. A.
    500 V
    B.
    5002 V
    C.
    D.
    1.1 x 500 V

  17. In figure, the short circuit current through terminal AB will be

  18. A.
    1.5 A
    B.
    3 A
    C.
    2 A
    D.
    1 A

  19. A parallel ac circuit in resonance will

  20. A.
    act like a resistor of low value
    B.
    have a high impedance
    C.
    have current in each section equal to the line current
    D.
    have a high voltage developed across each inductive and capacitive section