Home / ECE / Network Analysis and Synthesis :: Section 26

ECE :: Network Analysis and Synthesis

  1. A series RLC circuit is supplied from a variable frequency ac source. The resonant frequency is ω0. The voltage across C is maximum at a frequency

  2. A.
    equal to ω0
    B.
    slightly less than ω0
    C.
    slightly more than ω0
    D.
    none of the above

  3. The maximum phase difference between the applied voltage and current in a RLC series current with finite values of R, L, C, and f can be

  4. A.
    less than 90°
    B.
    less than 45°
    C.
    180°
    D.
    30°

  5. If figure, I = 2A if R = 20 Ω. When R = 10 Ω current I is

  6. A.
    1 A
    B.
    2 A
    C.
    2.5 A
    D.
    3 A

  7. A phasor is

  8. A.
    a line representing the magnitude and direction of an alternating quantity
    B.
    a line which represents the magnitude and phase of an alternating quantity
    C.
    an instrument used for measuring phases of an unbalanced 3-phase load
    D.
    a coloured tag or band for distinguishing between different phases of a 3-phase supply

  9. The phase difference (jω - p1 )

  10. A.
    phasor directed from p1 to jω
    B.
    phasor directed from origin to p1
    C.
    phasor directed from origin to jω point
    D.
    phasor directed from jω to p1

  11. Pick the correct statement with respect to following figure.

  12. A.
    both the circuit are not identical filter Ckts
    B.
    identical filter circuit at all frequencies
    C.
    identical filter circuit at low frequency
    D.
    identical filter circuit at high frequency

  13. Permittivity has the units of F/m.

  14. A.
    True
    B.
    False

  15. A capacitor used for power factor correction in single- phase circuit decreases

  16. A.
    the power factor
    B.
    the line current
    C.
    both the line current and the power factor
    D.
    the line current and increases power factor

  17. Which one of the following is an active component?

  18. A.
    Diode (p-n)
    B.
    Transistor as Amplifier
    C.
    Transformer
    D.
    Inductor

  19. A series RL circuit is switched on to an impulse. A δ(t) at t = 0. Then

  20. A.
    True
    B.
    False