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Measurements & InstrumentationPower Measurement

For a single-phase sinusoidal circuit, real power is?

  • AVI cosφ
  • BVI sinφ
  • CV/I
  • DI²/V
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Correct Answer: A. VI cosφ
Explanation: Real power is P=Vrms Irms cosφ.
Reference: Standard measurements and instrumentation: power measurement
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