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Network TheoryThree-Phase Circuits

In a balanced three-phase star-connected load, the relationship between line voltage VL and phase voltage Vph is?

  • AVL=Vph
  • BVL=sqrt(3)Vph
  • CVL=3Vph
  • DVL=Vph/sqrt(3)
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Correct Answer: B. VL=sqrt(3)Vph
Explanation: For a balanced star connection, line voltage magnitude is sqrt(3) times phase voltage magnitude.
Reference: Standard network theory: star connection
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