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  1. Find I for circuit shown below

  2. A.
    3 A
    B.
    1 A
    C.
    2 A
    D.
    0 A

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    Workspace

    Answer : Option C

    Explanation :

    Mesh Analysis

    Apply KVL at loop 2

    125i2 - 100i3 = 0 ...(i)

    Apply KVL at loop 3

    120i3 - 100i2 - 20i1 = 0

    i1 = 5A

    120i3 - 100i2 - 100 = 0

    120i3 - 100i2 = 100 ...(ii)

    From (i) 125i2 - 100i3 = 0

    ...(iii)

    Put equation (iii) in eq. (ii)

    120i 3 - 100i2 = 100

    120 x - 100i2 = 100

    150i2 - 100i2 = 100

    50i2 = 100

    i2 = 2A.


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