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  1. An infinite ladder is constructed with 1 Ω and 2 Ω resistors as shown below. Find i

    2. A.
    8.1818 A
    B.
    0 A
    C.
    9 A
    D.
    cannot be determined

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    Answer : Option C

    Explanation :

    As ladder is infinite

    ∴

    2R + R2 = 2 + 3R

    R2 - R - 2 = 0

    ∴

    R = 2 or R = -1

    Negative value of R is not possible

    ∴ R = 2

    ∴

    i = 9 A.

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