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ECE :: Network Analysis and Synthesis

  1. For the wave shown in figure, the average value is

  2. A.
    7.07 A
    B.
    5 A
    C.
    2.5 A
    D.
    0.5 A

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  3. Assertion (A): For a physically realisable driving point function, the degree of numerator and denominator should be equal.

    Reason (R): The sum of positive real functions is real.

  4. 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

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  5. In the figure circuit, V1 = 40 V. When R is 10 Ω. When R is zero, the value of V2 will be

  6. A.
    40 V
    B.
    30 V
    C.
    20 V
    D.
    10 V

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  7. In the circuit shown in the given figure, RL will absorb maximum power when its value is

  8. A.
    2.75 Ω
    B.
    7.5 Ω
    C.
    25 Ω
    D.
    27 Ω

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  9. In an RC series circuit excited by dc voltage E, the current at t = 0 is

  10. A.
    E/R
    B.
    E/C
    C.
    zero
    D.
    infinity

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  11. The current through a 10 Ω resistance in a dc circuit having two emf sources is 3A. If this resistance is changed to 20 Ω, the new value of current will be

  12. A.
    less than 3 A
    B.
    equal or less than 3 A
    C.
    equal to or less or more than 3 A
    D.
    1.5 A

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  13. A planar graph has 6 nodes and 7 branches. The number of meshes in the dual graph is

  14. A.
    2
    B.
    3
    C.
    4
    D.
    6

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  15. An ac voltage 20 sin 1000t feeds an R-C series circuit. R = 8 Ω and active power is 4 W. The power factor is

  16. A.
    1
    B.
    0.8
    C.
    0.6
    D.
    0.4

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  17. For a sine wave the average value is calculated over half the cycle.

  18. A.
    True
    B.
    False

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  19. Two resistances of 2 Ω each are connected in series. A shunt having zero resistance is connected across the combination. The overall resistance will be

  20. A.
    4 Ω
    B.
    1 Ω
    C.
    0.5 Ω
    D.
    zero

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