Electric Circuits
A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

 3∠30o Ω.
 27∠30o Ω
 30∠30o Ω.
None of these

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Electric Circuits
When we use super node technique

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

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