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ECE :: Network Analysis and Synthesis

  1. Hysteresis loss is proportional to

  2. A.
    f and B1.6m
    B.
    f and Bm
    C.
    f2 and Bm
    D.
    f2 and B2m

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  3. When a lead acid battery is fully charged the colours of its positive and negative plates are

  4. A.
    grey and dark brown
    B.
    dark grey and brown
    C.
    grey and brown
    D.
    dark brown and grey

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  5. Two independence parameters Z11 and Z12 of the two-port network in the figure are

  6. A.
    Z11 = 2.75 Ω and Z12 = 0.25 Ω
    B.
    Z11 = 3 Ω and Z12 = 0.5 Ω
    C.
    Z11 = 3 Ω and Z12 = 0.25 Ω
    D.
    Z11 = 2.25 Ω and Z12 = 0.5 Ω

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  7. Network transients are due to

  8. A.
    circuit resistance
    B.
    circuit voltage
    C.
    changes in energy stored in L and C
    D.
    circuit admittance

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  9. In a loss-free R-L-C circuit the transient current is

  10. A.
    oscillating
    B.
    square wave
    C.
    sinusoidal
    D.
    non-oscillating

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  11. If F(s) = , then f(t) =

  12. A.
    cos ω0t
    B.
    sin ω0t
    C.
    eat cos ω0t
    D.
    e-at cos ω0t

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  13. In the network of figure it is desired that maximum power be supplied to Z2. The values of Z1 and Z2 are fixed. However the transformation ratio 'a' of transformer can be changed. The value of 'a' for maximum power transfer is

  14. A.
    |Z2|/|Z1|
    B.
    [|Z2|/|Z1|]0.5
    C.
    [|Z2|/|Z1|]2
    D.
    [|Z2|/|Z1|]0.75

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  15. The magnitude response of a normalised Butterworth low pass filter is

  16. A.
    linear starting with value of unity at zero frequency and 0.707 at cut off frequency
    B.
    non linear all through but with values of unity at zero frequency and 0.707 at cut off frequency
    C.
    linear upto cut off frequency and nonlinear thereafter
    D.
    nonlinear upto cut off frequency and linear thereafter

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  17. In steady state condition inductor behave as

  18. A.
    open circuit
    B.
    short circuit
    C.
    current source
    D.
    voltage source

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  19. Assertion (A): Charge is dual of flux.

    Reason (R): Short circuit is dual of open circuit.

  20. 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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