Electric Circuits
A balanced star connected load with impedance of 30j - 300 Ω is supplied from a 3 - phase, 4-wire, 173 V system, the voltages to neutral being 100j -900, 100j - 300 and 100j -1500 V. The current in neutral wire is

  8.85 A.
  5 A.
  zero.
  50 A.

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Electric Circuits
When we use super node technique

 ideal voltage source is connected between two non reference nodes.
All of these
 current source branch is common for two meshes.
 ideal voltage source is connected between non reference node and reference.

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