If the reference bus is changed in two load flow runs with

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If the reference bus is changed in two load flow runs with same system data and power obtained for reference bur taken as specified P and Q in the latter run

1. the system losses will be unchanged but complex bus voltage will change
2. the system losses will be changed but complex bus voltages remain unchanged
3. the system losses as well be as complex bus voltage will change
4. the system losses as well be as complex bus voltage will unchanged

Correct Option: A

NA