Electric Circuits
In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be

 0.6.
 0.4.
 0.9.
 0.85.

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Electric Circuits
When we use super node technique

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

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