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ECE :: Network Analysis and Synthesis

  1. Fourier transform and F(jω) of a signal f(t) has the property

  2. A.
    F(jω) = F(-jω)
    B.
    F(jω) = -F(-jω)
    C.
    F(jω) = F*(jω)
    D.
    F(jω) = -F*(-jω)

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  3. If f(t) = δ(t), F(s) =

  4. A.
    B.
    C.
    1
    D.
    s

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  5. In figure, the current I is

  6. A.
    1 A
    B.
    2 A
    C.
    4 A
    D.
    8 A

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  7. Figure shows the variation of Z(ω) for a positive real function. The function is

  8. A.
    RC impedance
    B.
    RL impedance
    C.
    RLC impedance
    D.
    Reactance function

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  9. The voltage drop per ampere-metre of an aluminium conductor is higher as compared to a copper conductor of the same size due to its higher

  10. A.
    insulation resistance
    B.
    resistivity
    C.
    conductivity
    D.
    current density

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  11. A n-port network is said to be active if power in the ckt is __________ .

  12. A.
    P > 0
    B.
    P < 0
    C.
    P = 0
    D.
    P = ∞

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  13. When a current flows through a coil of insulated wire, the coil shows the properties of a magnet.

  14. A.
    True
    B.
    False

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  15. Transformer coil is an insulator.

  16. A.
    True
    B.
    False

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  17. Assertion (A): An impulse has very high magnitude but very small duration.

    Reason (R): A pulse function is always rectangular.

  18. 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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  19. The active elements on the positive and negative plates of lead acid battery are:

  20. A.
    lead peroxide and lead
    B.
    lead and lead peroxide
    C.
    lead peroxide and lead sulphate
    D.
    lead and lead

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