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Network TheoryThree-Phase Circuits

The total real power in a balanced three-phase load is?

  • AVL IL cos(phi)
  • B√3 VL IL cos(phi)
  • C3 VL IL only
  • DVL IL sin(phi)
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Correct Answer: B. √3 VL IL cos(phi)
Explanation: Balanced three-phase real power is P=√3 VL IL cos(phi).
Reference: Standard network theory: three-phase circuits
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