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

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Electric Circuits
What is called the instantaneous value of an alternating current?

 The value of peak quantity at any instant.
 The value of alternating frequency at any instant.
 The value of peak current at any instant.
 The value of alternating quantity at any instant.

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