The voltage regulation of synchronous generator operating at unity power factor is

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The voltage regulation of synchronous generator operating at unity power factor is:

  1. Small Negative
  2. Zero
  3. Small Positive
  4. None of these

Correct answer: 3. Small positive

Explanation:

Voltage regulation is mathematically defined as:

VR = (Vnl – Vfl)/ Vfl

For unity power factor loads, the full load voltage is smaller (but nearly closer to full load voltage) than no-load voltage and thus the voltage regulation is small positive.

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