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ECE :: Network Analysis and Synthesis

  1. In a series RLC circuit the phase angle θ of impedance Z ∠θ is positive. The circuit will behave as

  2. A.
    resistive circuit
    B.
    RC circuit
    C.
    RL circuit
    D.
    either RL or RC circuit

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  3. If A = 3 + j1, A4 =

  4. A.
    3.16 ∠18.4°
    B.
    100 ∠73.72°
    C.
    100 ∠18.4°
    D.
    3.16 ∠73.22°

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  5. In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is

  6. A.
    1 A
    B.
    1.25 A
    C.
    6 A
    D.
    6.25 A

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  7. Figure shows a dc circuit fed by a current source. With respect to terminals AB, Thevenin's voltage and Thevenin's resistance are

  8. A.
    VTH = 5 V, RTH = 0.75 Ω
    B.
    VTH = 2.5 V, RTH = 0.75 Ω
    C.
    VTH = 2.5 V, RTH = 1 Ω
    D.
    VTH = 5 V, RTH = 1 Ω

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  9. Colour code of carbon resistors has only two bands.

  10. A.
    True
    B.
    False

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  11. A coil has resistance R and inductance L. At ω = ∞ the phase angle between voltage and current is

  12. A.
    B.
    180°
    C.
    45°
    D.
    90°

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