Electric Circuits
For balanced star load, if unbalanced line current are IR, IY, IB equal to - j10, - j10 and - j20 respectively, the neutral current will be equal to

  (8.66 + j5) A.
  (8.66 - j5) A.
  (-8.66 - j5) A.
  (-9.66 + j5) A.

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