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ECE :: Network Analysis and Synthesis

  1. An m derived and constant k filter section connected in cascade give

  2. A.
    proper impedance matching
    B.
    proper phase shift characteristic
    C.
    proper attenuation characteristic
    D.
    all of the above

  3. At resonance, the parallel circuit constituted by an iron-cored coil and a capacitor behaves like

  4. A.
    open circuit
    B.
    short circuit
    C.
    pure resistor of value R
    D.
    pure resistor of value much higher than R

  5. Carbon resistances are used in very high values.

  6. A.
    True
    B.
    False

  7. In a linear bilateral passive element two port which of the following holds for z parameters?

  8. A.
    z11 = z22
    B.
    z12 z22 = z11 z22
    C.
    z11 z12 = z22 z21
    D.
    z12 = z21

  9. During discharging a capacitor through a resistance, voltages across R and C are equal in magnitude.

  10. A.
    True
    B.
    False

  11. In an RLC series circuit having finite values of RLC, the phase difference between applied voltage and current is

  12. A.
    always 0°
    B.
    between 0 and 180°
    C.
    between 0 and 90°
    D.
    always 90°

  13. In ZRC (s) = 0 at s =∞, the last element in second Foster realization will be

  14. A.
    R
    B.
    C
    C.
    R and C in series
    D.
    R and C in parallel

  15. Assertion (A): The dual of a circuit can be drawn by window-dot method.

    Reason (R): The principle of duality is of great help in circuit analysis.

  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. A short-circuit is that which is

  18. A.
    used short pieces of wire
    B.
    goes only a short distance
    C.
    is used for dimming light
    D.
    offer very low resistance path for current to flow

  19. In the voltage equation v = 500 e-5t sin (2p 50t), the frequency is

  20. A.
    2p x 50 Hz
    B.
    50 Hz
    C.
    D.
    (2p x 50 Hz) 5 Hz