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  1. Find RTH

    2. A.
    200 Ω
    B.
    0 Ω
    C.
    400 Ω
    D.
    None of these

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    Answer : Option C

    Explanation :

    Since there is no independent source in the network

    VTH = O V

    To find RTh apply : A current source of 1 A across A and B.

    Apply KCL at node n1

    Apply KCL at node Vn2

    Vn1 = 2Vx put in (i)

    ∴ Vn2 = 4vx

    put in (ii)

    100 + Vx = 2Vx

    100 = Vx

    ∴ Vn2 = 4Vx = 400 V

    ∴ .

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