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Three-Phase Measurement MCQs

Practice Three-Phase Measurement MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 2
Measurements & InstrumentationThree-Phase Measurement

For a balanced three-phase load at unity power factor, the two wattmeters in the two-wattmeter method ideally read?

  • AEqual positive values
  • BEqual and opposite values
  • COne zero and one negative
  • DBoth zero
Report an error
Correct Answer: A. Equal positive values
Explanation: At φ=0, W1=VLIL cos30° and W2=VLIL cos30°, so the readings are equal and positive.
Reference: Standard measurements and instrumentation: three-phase measurement