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  1. An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively

    The values of G2 and H, respectively are

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    Answer : Option A

    Explanation :

    Vi(s) = Z1I1 + Z3(I1 - I2) ...(i)

    V0(s) = Z4I2

    I2(Z3 + Z2 + Z4) = Z3I1 ...(ii)

    From signal flow graph

    I2 = I1G2

    Hence,

    ...(iii)

    From SFG ...(iv)

    From (ii), (iii), (iv) we get H.


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