FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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In an ac circuit with no phase lead or lag, which statement is true?

  1. Real power is less than apparent power

  2. Real power equals apparent power

  3. Real power is half of apparent power

  4. Real power is twice the apparent power

The correct answer is: Real power equals apparent power

In an ac circuit with no phase lead or lag, real power is equal to apparent power. This is because the voltage and current are in phase with each other, meaning that the power factor is 1. Any variations in the power factor will result in a difference between real and apparent power. Therefore, options A, C, and D are incorrect because they state that real power is less than, half of, or twice the apparent power, which would only be true if there was a difference in phase between voltage and current.

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