The voltage regulation of synchronous generator operating at a lagging power factor is

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

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

Correct answer: 3. Positive

The synchronous generator operating at the lagging power factor has large positive voltage regulation.

Voltage regulation is mathematically defined as:

VR = (V_nl – V_fl)/ V_fl

For lagging power factor the no-load voltage (Vnl) is quite larger then full load voltage (Vfl) and thus the voltage regulation is positive.