Negative voltage regulation is indicative that the load is___________?

Related Mcqs:

1. Minimum voltage regulation occurs when the power factor of the load is_____________?

   A. unity
   B. lagging
   C. leading
   D. zero

2. A transformer can have zero voltage regulation at______________?

   A. leading power factor
   B. lagging power factor
   C. unity power factor
   D. zero power factor

3. A good voltage regulation of a transformer means________________?

   A good voltage regulation of a transformer means
   A. output voltage fluctuation from no load to full load is least
   B. output voltage fluctuation with power factor is least
   C. difference between primary and secondary voltage is least
   D. difference between primary and secondary voltage is maximum

4. For given applied voltage, with the increase in frequency of the applied voltage?

   A. eddy current loss will decrease
   B. eddy current loss will increase
   C. eddy current loss will remain unchanged
   D. none of the above

5. In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?

   A. friction and windage losses
   B. copper losses
   C. hysteresis and eddy current losses
   D. none of the above

6. The no load current in a transformer lags behind the applied voltage by an angle of about_____________?

   A. 180°
   B. 120″
   C. 90°
   D. 75°

7. In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?

   A. hysteresis and eddy current losses
   B. friction and windage losses
   C. copper losses
   D. none of the above

8. The no-load current drawn by transformer is usually what per cent of the full-load current ?

   A. 0.2 to 0.5 per cent
   B. 2 to 5 per cent
   C. 12 to 15 per cent
   D. 20 to 30 per cent

9. The full-load copper loss of a trans¬former is 1600 W. At half-load, the copper loss will be___________?

   A. 6400 W
   B. 1600 W
   C. 800 W
   D. 400 W

10. In an actual transformer the iron loss remains practically constant from no load to full load because:____________?

    A. value of transformation ratio remains constant
    B. permeability of transformer core remains constant
    C. core flux remains practically constant
    D. primary voltage remains constant
    C. secondary voltage remains constant